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OpenAPI Specification

openapi: 3.2.0
info:
  title: FabTally Discovery API
  version: 0.2.0
  description: 'Pay-per-call utilities for AI agents: slicer-accurate FDM 3D-printing quotes and signed point-in-time URL attestations. Settlement via x402 (USDC on Base).'
  x-guidance: 'Two paid endpoints, both x402 (USDC on Base). POST /agent/v1/quote takes a multipart body (file=STL/3MF/STEP, plus optional material and quantity) and returns print time, filament grams and a priced quote ($0.005). POST /agent/v1/attest takes JSON {url, check, needle?} and returns an ed25519-signed record of what the URL returned ($0.01). GET /agent/overview and GET /agent/v1/attest/schema are free discovery docs. Each paid call responds 402 with an x402 `accepts` challenge; pay and retry to receive the result. Bring your own pricing: POST /agent/v1/quote accepts optional material_cost_per_kg, machine_rate_per_hour, setup_fee, margin, markup_percent, minimum_price and currency — omit for hobbyist defaults, pass your own for business economics (config is free; call price unchanged). The quote echoes a `pricing_basis` object of default-vs-custom values.'
  contact:
    email: hello@fabtally.com
servers:
- url: https://fabtally.com
tags:
- name: Discovery
paths:
  /agent/overview:
    get:
      operationId: overview
      summary: Service overview — description, pricing, live material profiles (free)
      tags:
      - Discovery
      security: []
      responses:
        '200':
          description: Overview document
          content:
            application/json:
              schema:
                type: object
  /agent/v1/attest/schema:
    get:
      operationId: attest_schema
      summary: Attestation schema + ed25519 verification key (free)
      tags:
      - Discovery
      security: []
      responses:
        '200':
          description: Attestation I/O schema, limits, and public verification key
          content:
            application/json:
              schema:
                type: object
  /agent/health:
    get:
      operationId: health_check
      summary: Health check (free)
      tags:
      - Discovery
      security: []
      responses:
        '200':
          description: OK