ExchangeRebel Batch Scorer 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: Batch Scorer
paths:
  /toll/batch/score:
    post:
      tags:
      - Batch Scorer
      summary: Score batch-payment vouchers for settlement risk
      responses:
        '200':
          description: Success. Response shape is documented in the service catalog (GET /health on the service).
          content:
            application/json:
              example:
                score: 79
                risk_level: low
                factors:
                - factor: signature
                  points: 30
                  detail: Ed25519 signature valid
                  weight: 30
                - factor: history
                  points: 10
                  detail: No history — new payer, neutral
                  weight: 25
                - factor: amount
                  points: 9
                  detail: Insufficient amount history — neutral
                  weight: 15
                - factor: expiry
                  points: 10
                  detail: Expiry reasonable (1h)
                  weight: 10
                - factor: velocity
                  points: 10
                  detail: No recent activity — normal
                  weight: 10
                - factor: freshness
                  points: 10
                  detail: Freshly issued
                  weight: 10
                recommendation: accept
                voucher_id: d2625c6ea5d1cabe
                scored_at: '2026-10-16T17:27:30.628Z'
                inputs_summary:
                  voucher: caller-supplied signed voucher (payer, amount, nonce, expiry, issued_at, signature)
                  payer_history_vouchers: 0
                  factors_scored: 6
                paid_via: payai
                envelope:
                  v: 1
                  service: batch-scorer
                  as_of: '2026-10-16T17:27:30.628Z'
                  source: signed voucher + payer checkpoint history (KV)
                  grade: derived
                  changes:
                    supported: false
        '402':
          description: 'Payment Required (x402). The PAYMENT-REQUIRED response header carries the x402 v2 PaymentRequired object (base64 JSON: scheme, CAIP-2 network, amount, asset, payTo, plus the bazaar discovery extension); the response body carries the same challenge in x402 v1 form for compatibility, naming the SOL recipient and USDC token account on Solana plus a fresh memo. To pay on this service''s rail: pay with the memo attached (Solana Memo program), then retry with header ''X-Payment-Tx: <transaction signature>'' and query parameter ''toll_memo=<memo>''.'
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                voucher:
                  type: object
                  description: object {payer (base64 pubkey), amount, nonce, expiry, issued_at, signature (base64 Ed25519)}
      x-payment-info:
        protocols:
        - x402
        price:
          mode: fixed
          currency: USD
          amount: '0.005'
      security:
      - x402Payment: []
      operationId: postTollBatchScore
      x-operation-id-source: derived
  /toll/batch/checkpoint:
    post:
      tags:
      - Batch Scorer
      summary: Record a voucher outcome in the payer reputation graph (free)
      responses:
        '200':
          description: Success. Response shape is documented in the service catalog (GET /health on the service).
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                voucher_id:
                  type: string
                  description: string
                payer:
                  type: string
                  description: string
                amount:
                  type: number
                  description: number
                status:
                  type: string
                  description: settled|defaulted|expired
      security: []
      operationId: postTollBatchCheckpoint
      x-operation-id-source: derived
  /toll/batch/payer/{address}:
    get:
      tags:
      - Batch Scorer
      summary: Payer reputation summary (aggregates only)
      responses:
        '200':
          description: Success. Response shape is documented in the service catalog (GET /health on the service).
      parameters:
      - name: address
        in: path
        required: true
        schema:
          type: string
        description: Payer public key
      security: []
      operationId: getTollBatchPayerByAddress
      x-operation-id-source: derived
  /toll/batch/health:
    get:
      tags:
      - Batch Scorer
      summary: Service status + scoring weights/thresholds
      responses:
        '200':
          description: Success. Response shape is documented in the service catalog (GET /health on the service).
      security: []
      operationId: getTollBatchHealth
      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.'