ExchangeRebel Argument Check API

openapi: 3.2.0
info:
  title: ExchangeRebel — pay-per-call APIs for AI agents (x402 on…
  version: 1.0.0
  contact:
    name: 'ExchangeRebel (operator: Rebel Data)'
    url: https://exchangerebel.com
    email: sound.money.investing@gmail.com
  x-guidance: 'All paid operations use x402 on Solana: call without payment to get a 402 challenge (SOL recipient + USDC token account + fresh memo), pay with the memo attached via the Solana Memo program, then retry with header X-Payment-Tx: <signature> and ?toll_memo=<memo>. Challenges are dual-version: the PAYMENT-REQUIRED header carries the x402 v2 PaymentRequired object and the response body carries the same challenge in x402 v1 form for compatibility. Free operations (security: []) include each service''s /health catalog with full response shapes. Prices in x-payment-info are USD per call unless the summary says otherwise (RPC is per 1,000-request block; Telegram provisioning is per bot-month; transcription is per minute of audio).'
  description: '67 data and utility APIs behind x402 tolls, settled in SOL or USDC on Solana. Call a paid endpoint without payment to receive a 402 x402 challenge (recipient + fresh memo), pay with the memo attached via the Solana Memo program, then retry with the X-Payment-Tx header and toll_memo query parameter. Free catalog/health endpoints are marked without x-payment-info. Full catalogs: GET /toll/discovery and each service''s /health.'
servers:
- url: https://exchangerebel.com
tags:
- name: Argument Check
paths:
  /toll/argument-check:
    get:
      tags:
      - Argument Check
      summary: Argument Check service catalog
      responses:
        '200':
          description: 'Success. Returns the service catalog: what an argument/schema check includes, the price ($0.02 per check), the published criteria (tool-argument/v1) with the closed repair whitelist (R1-R9), the pinned test corpus, and the scope statement (mechanical repairs only - the service never invents an argument value).'
      security: []
      operationId: getTollArgumentCheck
      x-operation-id-source: derived
  /toll/argument-check/health:
    get:
      tags:
      - Argument Check
      summary: Argument Check service health
      responses:
        '200':
          description: Success. Returns service liveness and the report signer address.
      security: []
      operationId: getTollArgumentCheckHealth
      x-operation-id-source: derived
  /toll/argument-check/criteria:
    get:
      tags:
      - Argument Check
      summary: The published argument-check criteria
      responses:
        '200':
          description: 'Success. Returns the full published criteria (tool-argument/v1): the published schema subset, the closed repair whitelist R1-R9 with the cannot-invent rule per entry, the never-a-repair list, and the pinned public test corpus identity; every verdict is reproducible from them.'
      security: []
      operationId: getTollArgumentCheckCriteria
      x-operation-id-source: derived
  /toll/argument-check/corpus:
    get:
      tags:
      - Argument Check
      summary: The pinned public test corpus identity
      responses:
        '200':
          description: 'Success. Returns the public test corpus identity for argument checks: corpus id argument-check-corpus/v1 and its SHA-256 pin 572e80b4b849ed769f888404f51aad50548db89b7dc7fbc55da69806a636eeef (the SHA-256 of the corpus''s canonical serialization, verifiable with the published harness). The corpus is buyer-runnable before paying.'
      security: []
      operationId: getTollArgumentCheckCorpus
      x-operation-id-source: derived
  /toll/argument-check/precheck:
    post:
      tags:
      - Argument Check
      summary: 'Free pre-check: validation + assessability only (no verdict, no factors)'
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                caller:
                  type: string
                  description: Solana base58 wallet of the operator; keys the free allowance (100/day per wallet).
                arguments:
                  description: 'The tool-call arguments blob: a parsed JSON object or the raw JSON text.'
                schema:
                  type: object
                  description: The tool's JSON Schema (the published subset in the criteria).
              required:
              - caller
              - arguments
              - schema
      responses:
        '200':
          description: 'Success. Returns assessability only: whether the submission is well-formed and checkable. No verdict and no factors are computed. A malformed submission is refused free with named reasons. When the caller''s free allowance is exhausted, the response is the /toll/argument-check payment challenge instead.'
      security: []
      operationId: postTollArgumentCheckPrecheck
      x-operation-id-source: derived
  /toll/argument-check/check:
    post:
      tags:
      - Argument Check
      summary: Check one arguments blob against one tool JSON Schema ($0.02)
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                arguments:
                  description: 'The tool-call arguments blob: a parsed JSON object or the raw JSON text.'
                schema:
                  type: object
                  description: The tool's JSON Schema (the published subset in the criteria).
              required:
              - arguments
              - schema
      responses:
        '200':
          description: 'Success. Returns the signed report: verdict VALID, REPAIRED (with the repaired blob and the exact diff - path, before, after, whitelist rule per change), or UNREPAIRABLE (every blocking defect named by path and reason).'
        '402':
          description: 'Payment Required (x402). A per-item fee: $0.02 per check - each submitted arguments+schema pair is charged at $0.02; the payment includes one pre-dispatch check of the one arguments blob and the one tool JSON Schema you submit — a verdict of VALID, REPAIRED, or UNREPAIRABLE; when REPAIRED, the repaired arguments blob and the exact diff (path, before, after, and the whitelist rule applied for every change); when UNREPAIRABLE, every blocking defect named by path and reason. Repairs are mechanical only, from the published whitelist in the criteria: the service never invents an argument value — a missing required field, or a value only a guess could fix, is UNREPAIRABLE. Factors printed; no composite score. Nothing submitted is stored beyond the payments ledger''s closed field list. The response body carries the payment instructions in x402 v1 form: payTo (the operator''s Solana wallet), the amount (20000 USDC units = $0.02 per check) and a fresh memo. Pay in USDC on Solana with the memo attached via the Solana Memo program, then resubmit the same request with the payment transaction in the X-Payment-Tx header and ?toll_memo=<memo>, re-sending the request body. The PAYMENT-REQUIRED response header carries the same object in x402 v2 form.'
      x-payment-info:
        protocols:
        - x402
        price:
          mode: fixed
          currency: USD
          amount: '0.02'
      security:
      - x402Payment: []
      operationId: postTollArgumentCheckCheck
      x-operation-id-source: derived
  /toll/argument-check/metrics:
    get:
      tags:
      - Argument Check
      summary: Argument Check aggregate counters
      responses:
        '200':
          description: Success. Returns aggregate counters (paid calls, distinct payers, free pre-checks today). Aggregate only - no payer identities, no submitted content.
      security: []
      operationId: getTollArgumentCheckMetrics
      x-operation-id-source: derived
components:
  securitySchemes:
    x402Payment:
      type: apiKey
      in: header
      name: X-Payment-Tx
      description: 'x402 toll payment proof: the Solana transaction signature of a payment carrying the memo from the 402 challenge; send together with ?toll_memo=<memo>. Payment itself is made on-chain in SOL or USDC to the recipient named in the challenge.'