openapi: 3.2.0
info:
  title: Macaroon Network Agent Services INFRASTRUCTURE & UTILITY API
  description: Pay-per-call scientific search, evidence, validation, and simulation services with explicit provenance and limitations.
  version: 1.0.0
  x-guidance: Choose a concrete POST /execute/<capability-id> operation. Send the documented JSON body, receive an x402 v2 USDC challenge on Base, then retry with PAYMENT-SIGNATURE. Treat licence status and validation claims exactly as returned; unknown evidence is not permission.
tags:
- name: INFRASTRUCTURE & UTILITY
paths:
  /execute/chain-state-snapshot-v1:
    post:
      operationId: execute_chain_state_snapshot_v1
      summary: Live Chain State Snapshot
      description: Current block number and gas price for Base and Polygon mainnet, fetched live via RPC on every call. Unlike this catalogue's corpus-search listings, this makes a real outbound network call on purchase -- freshness is the product, not a stored snapshot.
      tags:
      - INFRASTRUCTURE & UTILITY
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.001000'
        protocols:
        - x402: {}
        network: base
        asset: USDC
        paymentRequiredHeader: PAYMENT-REQUIRED
        paymentSignatureHeader: PAYMENT-SIGNATURE
        paymentResponseHeader: PAYMENT-RESPONSE
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - input
              - predicate
              properties:
                input:
                  type: object
                  required:
                  - network
                  properties:
                    network:
                      enum:
                      - base
                      - polygon
                      type: string
                      description: Which mainnet to query.
                predicate:
                  type: object
                  description: Acceptance predicate evaluated before settlement.
                  example:
                    type: all
                    conditions:
                    - type: field_changed
                      field: $.block_number
                      value: 1
                      operator: gte
                    - type: field_changed
                      field: $.provenance.live_rpc_call
                      value: true
                      operator: eq
              additionalProperties: false
            example:
              input:
                network: base
              predicate:
                type: all
                conditions:
                - type: field_changed
                  field: $.block_number
                  value: 1
                  operator: gte
                - type: field_changed
                  field: $.provenance.live_rpc_call
                  value: true
                  operator: eq
      responses:
        '200':
          description: Predicate-gated result and commercial receipt.
          content:
            application/json:
              schema:
                type: object
                required:
                - payload
                - predicate_passed
                - receipt
                properties:
                  payload:
                    type: object
                    required:
                    - network
                    - block_number
                    - gas_price_wei
                    - fetched_at
                    - provenance
                    properties:
                      network:
                        type: string
                      fetched_at:
                        type: string
                      provenance:
                        type: object
                        required:
                        - live_rpc_call
                      block_number:
                        type: integer
                      gas_price_wei:
                        type: integer
                  predicate_passed:
                    type: boolean
                  receipt:
                    type: object
        '402':
          description: x402 Payment Required. Decode PAYMENT-REQUIRED, satisfy the declared exact USDC requirement, then retry this same valid JSON request with PAYMENT-SIGNATURE.
          headers:
            PAYMENT-REQUIRED:
              description: Base64-encoded x402 v2 payment requirements.
              schema:
                type: string
        '422':
          description: Invalid paid execution request.