sigtap Agent Tools

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

13 paid x402 tools, USDC/Base. Free check: GET /preview<path>=200 sample. Copy-paste pay: /llms.txt

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "sigtap Agent Tools": {
      "url": "https://sigtap-mcp.sigtap.workers.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (13)

• catalog

  List all 12 paid tools with live prices + free preview routes (FREE, no payment)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• deliverability_audit

  SPF/DKIM/DMARC deliverability audit for a sending domain Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/deliverability = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)

  Parameters:

  • domain (required) — string — Domain to audit, e.g. openai.com

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• email_grade

  12-point cold email score with concrete fixes Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/grade = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.005 USDC on Base, x402)

  Parameters:

  • subject (required) — string — Email subject line
  • body (required) — string — Plain-text email body

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• email_template

  Personalized cold email from proven templates Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/template = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.01 USDC on Base, x402)

  Parameters:

  • name — string — Recipient name
  • offer — string — What you are offering
  • company — string — Recipient company
  • persona — string — founder | agency | freelancer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• hash_text

  SHA-256/384/512, hex, base64, base64url and CRC32 of a UTF-8 string Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/hash = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • text (required) — string — UTF-8 text to hash

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jwt_decode

  Decode a JWT header+payload with safety flags (never verifies the signature) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/jwt-decode = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • token (required) — string — JWT to decode

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• uuid_batch

  Batch random IDs: UUIDv4, UUIDv7, ULID or nanoid Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/uuid = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • count — integer — How many IDs, 1-100 (default 1)
  • version — string — v4 | v7 | ulid | nanoid (default v4)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• slugify

  Unicode-aware url-safe slug (latin + Cyrillic transliteration) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/slug = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • text (required) — string — Text to slugify
  • maxlength — integer — Max slug length 1-500 (default 60)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• json_tools

  Flatten JSON to dot paths or convert rows to CSV Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/json = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • data (required) — string — JSON string
  • mode — string — flatten | csv (default flatten)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• regex_test

  Regex matches with groups, count and a backtracking-risk heuristic Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/regex = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • pattern (required) — string — Regular expression
  • text (required) — string — Text to search
  • flags — string — Regex flags (subset of dgimsuy)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• crypto_price

  Coinbase spot/buy/sell price with spread percent Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/crypto-price = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.002 USDC on Base, x402)

  Parameters:

  • from (required) — string — Base asset code, e.g. BTC
  • to (required) — string — Quote asset code, e.g. USD

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• domain_age

  Domain registration date, age in days and registrar via RDAP Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/domain-age = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)

  Parameters:

  • domain (required) — string — Domain to look up

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• weather

  Current weather + next 3h temperatures (open-meteo) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/weather = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

  Parameters:

  • lat (required) — number — Latitude -90..90
  • lon (required) — number — Longitude -180..180

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

Publisher website Repository

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