SALT19 Agent Utility Grid

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

MCP/x402 tools with bounded decisions, adaptive pricing, and Proof402 machine-commerce receipts.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "SALT19 Agent Utility Grid": {
      "url": "https://api.salt19.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (33)

• find-salt19-tool read-only

  FREE START-HERE ROUTER. Describe the fresh external fact, live state, developer intelligence, or bounded decision you need. Returns the best current SALT19 tool, live price, schema, alternatives, and exact x402 preflight next step. No payment is required for routing.

  Parameters:

  • need (required) — string — Natural-language description of the external state or machine operation needed.
  • max_price_usd — number — Optional hard maximum price for the eventual paid tool call.
  • prefer_fresh_state — boolean — Prefer low-friction Fresh-State primitives when they satisfy the request.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• salt19-pricing read-only

  FREE catalog/pricing surface. Returns current discoverable SALT19 products, live x402 prices, schemas, and Fresh-State acquisition roles so an agent can budget before choosing a paid call.

  Parameters:

  • tier — string
  • max_price_usd — number

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• base-contract-state

  Inspect whether a Base address currently has deployed bytecode and return code size plus best-effort ERC-20 metadata. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • address (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• base-token-allowance

  Read a live ERC-20 allowance on Base for an owner/spender pair without an API key. Returns the current block and raw token units. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • token_address (required) — string
  • owner (required) — string
  • spender (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• base-token-balance

  Read a live ERC-20 token balance on Base and return raw units plus best-effort token decimals/symbol metadata without signup or an API key. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • token_address (required) — string
  • owner (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• base-transaction-status

  Check current Base transaction receipt state and return PENDING, CONFIRMED_SUCCESS, or CONFIRMED_REVERTED with block and gas evidence. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • transaction_hash (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• base-wallet-balance

  Read a wallet's live native ETH balance on Base at the latest block without an API key. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • address (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• github-repo-facts

  Return current public GitHub repository facts such as archive state, license, stars, forks, branch and latest push without the premium adoption decision. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • repo (required) — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• npm-package-facts

  Return live npm registry facts for the latest or requested package version without the higher-priced vulnerability and adoption decision layer. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • package (required) — string
  • version — string
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• nws-active-alerts

  Return current U.S. National Weather Service active alerts for a state or territory as compact structured JSON. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • area (required) — string
  • limit — integer
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• sec-company-facts

  Return selected latest SEC XBRL company facts from EDGAR's live companyfacts feed with source dates and units. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • cik (required) — string
  • concepts — array
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• sec-recent-filings

  Return recent SEC EDGAR filings for a company CIK from the live SEC submissions feed, normalized for agent consumption. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • cik (required) — string
  • limit — integer
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• url-to-llm-markdown

  Fetch a public web page, remove scripts/styles/navigation noise, and return bounded LLM-friendly Markdown plus canonical URL and fetch provenance. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • url (required) — string
  • max_chars — integer
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• usgs-earthquakes

  Query recent USGS earthquake events by lookback window and minimum magnitude and return compact live event state. Price: $0.01 via x402. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • hours — integer
  • limit — integer
  • min_magnitude — number
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier preserved across challenge/payment/retries.
  • _x402_payment_signature — string — Optional x402 payment proof. Omit on the first call; include after satisfying the challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• agent-claim-output-verifier

  Map an autonomous agent claim or output to supplied evidence and return SUPPORTED, PARTIALLY_SUPPORTED, NOT_PROVEN, or CONTRADICTED with explicit unsupported elements, contradictions, missing evidence, and recommended verification. Price: $0.50 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once.

  Parameters:

  • claim (required) — string — Input parameter "claim" for the agent-claim-output-verifier tool.
  • context — string — Input parameter "context" for the agent-claim-output-verifier tool.
  • evidence — array — Input parameter "evidence" for the agent-claim-output-verifier tool.
  • required_standard — string — Input parameter "required_standard" for the agent-claim-output-verifier tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• agent-code-change-risk-gate

  Static pre-merge risk gate for autonomous code changes: inspect a supplied unified diff for security-sensitive surfaces, destructive operations, architecture/constraint conflicts, test requirements, rollback risk, and bounded breaking-change risk before an agent merges or deploys. Price: $1.25 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • diff (required) — string — Input parameter "diff" for the agent-code-change-risk-gate tool.
  • context — string — Input parameter "context" for the agent-code-change-risk-gate tool.
  • constraints — array — Input parameter "constraints" for the agent-code-change-risk-gate tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• agent-decision-preflight

  Before an autonomous coding agent installs or adopts software, return a bounded GO, WARN, or BLOCK decision with evidence and a portable SALT19 verification receipt. Price: $0.50 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • decision_type (required) — string — Input parameter "decision_type" for the agent-decision-preflight tool.
  • target (required) — object — Input parameter "target" for the agent-decision-preflight tool.
  • constraints — object — Input parameter "constraints" for the agent-decision-preflight tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• agent-plan-verifier

  Verify an autonomous agent plan before execution for missing preconditions, destructive steps, unsafe ordering, goal misalignment, constraint violations, and repair actions, returning a bounded GO/WARN/BLOCK result. Price: $0.75 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • goal (required) — string — Input parameter "goal" for the agent-plan-verifier tool.
  • plan (required) — array — Input parameter "plan" for the agent-plan-verifier tool.
  • constraints — array — Input parameter "constraints" for the agent-plan-verifier tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• commerce-decision

  Before an autonomous agent pays an x402 challenge, bind the request, accepted payment offer, and machine spending policy into a deterministic GO/WARN/BLOCK decision with SHA-256 commitments. Price: $0.02 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • request (required) — object — Input parameter "request" for the commerce-decision tool.
  • payment_required (required) — object — Input parameter "payment_required" for the commerce-decision tool.
  • policy (required) — object — Input parameter "policy" for the commerce-decision tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• commerce-receipt

  Verify an x402 commercial state and persist a signed Ed25519 Proof402 receipt whose Commerce State Root commits request, offer, policy, payment, settlement, and delivery evidence; receipts are later Merkle-batched for public inclusion proofs. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • request (required) — object — Input parameter "request" for the commerce-receipt tool.
  • payment_required (required) — object — Input parameter "payment_required" for the commerce-receipt tool.
  • payment_payload (required) — object — Input parameter "payment_payload" for the commerce-receipt tool.
  • settlement (required) — object — Input parameter "settlement" for the commerce-receipt tool.
  • delivery (required) — Input parameter "delivery" for the commerce-receipt tool.
  • policy — object — Input parameter "policy" for the commerce-receipt tool.
  • expected_delivery — object — Input parameter "expected_delivery" for the commerce-receipt tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.
  • target_salt19_operation_id — string — Input parameter "target_salt19_operation_id" for the commerce-receipt tool.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• commerce-verify

  Verify that an x402 v2 payment payload, settlement evidence, original request, accepted offer, spending policy, and delivered response are mutually bound; SALT19 operations can additionally be checked against authoritative D1 commercial state. Price: $0.03 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • request (required) — object — Input parameter "request" for the commerce-verify tool.
  • payment_required (required) — object — Input parameter "payment_required" for the commerce-verify tool.
  • payment_payload (required) — object — Input parameter "payment_payload" for the commerce-verify tool.
  • settlement (required) — object — Input parameter "settlement" for the commerce-verify tool.
  • delivery (required) — Input parameter "delivery" for the commerce-verify tool.
  • policy — object — Input parameter "policy" for the commerce-verify tool.
  • expected_delivery — object — Input parameter "expected_delivery" for the commerce-verify tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.
  • target_salt19_operation_id — string — Input parameter "target_salt19_operation_id" for the commerce-verify tool.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• dependency-go-no-go

  Dependency approval decision for coding agents: decide whether an npm dependency or package is safe to install or adopt and return GO, WARN, or BLOCK using vulnerabilities, security, license, maintenance, deprecation, and package metadata. Price: $0.25 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • package (required) — string — Input parameter "package" for the dependency-go-no-go tool.
  • version — string — Input parameter "version" for the dependency-go-no-go tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• dependency-upgrade-go-no-go

  Compare current and target npm versions and return GO/WARN/BLOCK plus UPGRADE/DEFER/BLOCK guidance, bounded semver risk, OSV security implications, recommended tests, and explicit NOT_PROVEN runtime, peer, migration, and ecosystem compatibility boundaries. Price: $0.20 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once.

  Parameters:

  • package (required) — string — Input parameter "package" for the dependency-upgrade-go-no-go tool.
  • current_version (required) — string — Input parameter "current_version" for the dependency-upgrade-go-no-go tool.
  • target_version (required) — string — Input parameter "target_version" for the dependency-upgrade-go-no-go tool.
  • runtime — string — Input parameter "runtime" for the dependency-upgrade-go-no-go tool.
  • framework — string — Input parameter "framework" for the dependency-upgrade-go-no-go tool.
  • constraints — array — Input parameter "constraints" for the dependency-upgrade-go-no-go tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• github-repo-preflight

  GitHub repository due diligence for coding agents: evaluate whether a public or open-source repository is safe and maintained enough to adopt using license, maintenance, release freshness, activity, project health, and risk signals. Price: $0.10 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • repo (required) — string — Input parameter "repo" for the github-repo-preflight tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• model-memory-fit

  Can this AI model run on my graphics card? Estimate model memory requirements and check whether a quantized LLM fits available GPU VRAM before loading or local inference. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • parameter_count_b (required) — number — Input parameter "parameter_count_b" for the model-memory-fit tool.
  • quantization_bits (required) — number — Input parameter "quantization_bits" for the model-memory-fit tool.
  • vram_gb (required) — number — Input parameter "vram_gb" for the model-memory-fit tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • runtime_overhead_ratio — number — Input parameter "runtime_overhead_ratio" for the model-memory-fit tool.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• npm-package-intel

  Check whether an npm package is deprecated or vulnerable before installing it, including vulnerabilities, license, maintenance, freshness, dependency health, and package.json risk signals. Price: $0.05 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • package (required) — string — Input parameter "package" for the npm-package-intel tool.
  • version — string — Input parameter "version" for the npm-package-intel tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• repo-adoption-go-no-go

  Repository adoption decision for autonomous coding agents using public GitHub maintenance, archive, license, and repository-health evidence, with explicit UNKNOWN and NOT_PROVEN boundaries for dependency, security, compatibility, integration, and project-fit claims. Price: $0.35 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • repo (required) — string — Input parameter "repo" for the repo-adoption-go-no-go tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• url-http-preflight

  Inspect a URL before an autonomous agent calls it, and preflight or verify a website or external API endpoint is healthy and safe to call by checking HTTP status, redirects, latency, and security headers. Price: $0.03 via x402. Generate one _salt19_operation_id per intended purchase, preserve it across retries, and add _x402_payment_signature after satisfying the challenge. A stable _salt19_operation_id is required and makes semantic retries at-most-once. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • url (required) — string — Input parameter "url" for the url-http-preflight tool.
  • _salt19_handoff_id — string — Optional SALT19 authorization handoff correlation. Preserve the same value across challenge, local signing, and paid retry.
  • _salt19_operation_id — string — Optional but recommended semantic purchase identifier. Generate once per intended purchase and preserve it across challenge, payment, timeout recovery, and retries for the strongest at-most-once contract. Standard x402 clients may omit it.
  • _x402_payment_signature — string — Optional x402 PAYMENT-SIGNATURE proof. Omit on the first call to receive the payment challenge; include after satisfying that challenge.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

• verify-decision-receipt read-only

  Free integrity lookup for a SALT19 decision receipt. verified=true proves the stored evidence still matches its recorded digest; it does not prove the underlying software is safe. _salt19_operation_id is recommended but optional for standard x402 compatibility.

  Parameters:

  • id (required) — string — SALT19 decision receipt UUID

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• x402-payment-preflight read-only

  Free buyer-side compatibility preflight. Returns the live SALT19 price, Base/USDC requirement, optional public wallet-balance sufficiency, and the exact next action without signing or moving funds.

  Parameters:

  • product (required) — string
  • max_price_usd — number
  • supports_x402 — boolean
  • wallet_address — string — Optional public EVM address only; never provide a private key.
  • supported_assets — array
  • supported_networks — array
  • autonomous_spend_allowed — boolean

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• report-payment-capability

  Free cooperative telemetry tool for reporting whether a client can use x402/Base/USDC or why it declined. Never submit private keys, payment signatures, or secret wallet material.

  Parameters:

  • decline_reason (required) — string
  • product — string
  • session_id — string — Optional opaque session label; stored only as a SHA-256 fingerprint.
  • supports_x402 — boolean
  • max_purchase_usd — number
  • supported_assets — array
  • wallet_available — string
  • supported_networks — array
  • autonomous_spend_allowed — string

  Hints: read-only no · destructive no · idempotent no · open-world no

• x402-authorization-handoff read-only

  Free handoff tool that generates a live PAYMENT-REQUIRED challenge for a concrete paid request, returns exact REST and MCP retry templates, and creates a correlation ID. It never signs or moves buyer funds.

  Parameters:

  • product (required) — string
  • arguments (required) — object — The exact paid tool arguments that will be retried after authorization. Do not include private keys, seed phrases, or payment signatures.
  • session_id — string
  • operation_id — string

  Hints: read-only yes · destructive no · idempotent no · open-world yes

• report-x402-authorization-progress

  Free cooperative telemetry for the local buyer authorization path. Report stage metadata only; never include private keys, seed phrases, raw signatures, or PAYMENT-SIGNATURE values.

  Parameters:

  • handoff_id (required) — string
  • stage (required) — string
  • sdk — string
  • error_code — string
  • signer_kind — string
  • client_timestamp — string
  • signer_available — string

  Hints: read-only no · destructive no · idempotent yes · open-world no

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