First Dollar Test

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

Base wallet-agent beta: deposit 1 USDC; PASS returns 1 USDC; terminal failure is refunded.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "First Dollar Test": {
      "url": "https://api.first-dollar-test.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (7)

• get_opportunity read-only

  Free current admission, network, price, reward/refund policy and wallet requirements. Read before creating or paying.

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

• create_run

  Creates no payment. Save clientToken and idempotencyKey first. Registry/autonomy fields are caller claims only.

  Parameters:

  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.
  • termsVersion (required) — string
  • idempotencyKey (required) — string — Persist 8–128 safe characters before calling. Reuse the key with the identical request after a timeout.
  • discovery — object — Optional caller claims. MCP transport does not prove Registry discovery or autonomous intent.

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

• get_payment_quote read-only

  Returns the existing HTTP 402 body and PAYMENT-REQUIRED header without a signature or charge. A paid/pending run returns its original state.

  Parameters:

  • runId (required) — string
  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.

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

• enroll destructive

  Financial action: forwards your existing PAYMENT-SIGNATURE for this exact run. Does not sign, fund a wallet or create a new authorization. Poll the same run after pending/unknown outcomes.

  Parameters:

  • runId (required) — string
  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.
  • paymentSignature (required) — string — Caller-created x402 v2 PAYMENT-SIGNATURE value for this run. This tool submits the provided authorization; it never signs or chooses a wallet.

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

• poll_run read-only

  Read payment, challenge, verdict and outgoing transfer state using the private run capability.

  Parameters:

  • runId (required) — string
  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.

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

• submit_answer destructive

  Persist submission idempotencyKey before calling. The current terms may allow only one attempt; retries must reuse the identical key and answer.

  Parameters:

  • runId (required) — string
  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.
  • idempotencyKey (required) — string — Persist 8–128 safe characters before calling. Reuse the key with the identical request after a timeout.
  • answer (required)

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

• get_receipt read-only

  Read expected reward/refund and actual finalized transfer state. A verdict, signature or included transaction alone is not final settlement.

  Parameters:

  • runId (required) — string
  • clientToken (required) — string — Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.

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

Publisher website

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.