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OpenAPI Specification

openapi: 3.2.0
info:
  title: AgentPay Gateway Plan API
  description: Buyer-side trust layer for x402 agents. verified_route ranks providers on paid delivery evidence and sybil-collapsed payer counts; pre_trade_check returns an ok/caution/avoid verdict before a trade; session_create opens a spend cap the gateway enforces for the paying wallet on Stacks and Base, with chain-verified receipts on a public ledger. USDC on Base and Stellar, sBTC or STX on Stacks (any Stacks x402 client).
  contact:
    name: AgentPay
    url: https://agentpay.tools/
    email: romudille@gmail.com
  version: 0.1.0
tags:
- name: Plan
paths:
  /v1/plan/estimate:
    post:
      summary: Estimate Plan
      description: 'Price a plan of tool calls without executing or paying for anything.


        Unknown tools don''t fail the request — they come back with

        exists=false so the agent can re-plan around them. External x402 URLs

        are annotated (and priced when possible) from the Prober''s telemetry.'
      operationId: estimate_plan_v1_plan_estimate_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/PlanEstimateRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security: []
      tags:
      - Plan
components:
  schemas:
    PlanEstimateRequest:
      properties:
        steps:
          items:
            $ref: '#/components/schemas/PlanStep'
          type: array
          maxItems: 100
          title: Steps
        budget:
          anyOf:
          - type: string
          - type: 'null'
          title: Budget
      type: object
      required:
      - steps
      title: PlanEstimateRequest
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    PlanStep:
      properties:
        tool:
          type: string
          title: Tool
        params:
          type: object
          title: Params
      type: object
      required:
      - tool
      title: PlanStep