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OpenAPI Specification

openapi: 3.2.0
info:
  title: DocImprint Checkpoints API
  version: 1.0.0
  description: Verifiable document intelligence for AI agents. Extract, summarize, translate, or fact-check any URL or document. Responses include cryptographic evidence bundles with on-chain attestation. Pay per call in USDC via x402 or use an API key.
servers:
- url: https://api.docimprint.com
security:
- ApiKeyAuth:
  - read
  - write
- ApiKeyHeader:
  - read
  - write
tags:
- name: Checkpoints
paths:
  /v1/checkpoints:
    post:
      summary: Create a new Merkle tree checkpoint
      operationId: createCheckpoint
      parameters:
      - name: force
        in: query
        schema:
          type: string
          enum:
          - 'true'
          - 'false'
          default: 'true'
        description: Force checkpoint creation even if few new bundles
      - name: batch_size
        in: query
        schema:
          type: integer
          default: 1
        description: Number of bundles to include in checkpoint
      responses:
        '200':
          description: '{ success: true, message: "No new completed bundles to checkpoint" }'
        '201':
          description: '{ success: true, checkpoint: { id, root_hash, leaf_count } }'
      tags:
      - Checkpoints
  /v1/checkpoints/{id}:
    get:
      summary: Get a checkpoint by ID
      operationId: getCheckpoint
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: '{ success: true, checkpoint }'
        '404':
          description: Checkpoint not found
      tags:
      - Checkpoints
  /v1/checkpoints/proof:
    get:
      summary: Get Merkle proof for a specific leaf hash or bundle ID
      operationId: getCheckpointProof
      parameters:
      - name: leaf_hash
        in: query
        schema:
          type: string
        description: SHA-256 leaf hash to prove
      - name: bundle_id
        in: query
        schema:
          type: string
        description: Bundle ID to look up leaf hash
      responses:
        '200':
          description: '{ success: true, checkpoint_id, root_hash, leaf_hash, leaf_index, leaf_count, proof: [...], created_at }'
        '400':
          description: Either leaf_hash or bundle_id required
        '404':
          description: Leaf hash not found in any checkpoint
      tags:
      - Checkpoints
  /v1/checkpoints/public-key:
    get:
      summary: Get the checkpoint signing public key
      operationId: getCheckpointPublicKey
      responses:
        '200':
          description: '{ success, key: { public_key, algorithm } }'
        '404':
          description: Checkpoint signing key is not configured
      tags:
      - Checkpoints
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: 'Bearer dr_live_... (or use X-API-Key header). Scopes: read (GET), write (POST/PUT/DELETE), admin (admin endpoints). Create keys at https://docimprint.com/pricing or via admin API.'
    ApiKeyHeader:
      type: apiKey
      in: header
      name: X-API-Key
      description: 'Alternative to Authorization: Bearer header. Scopes same as ApiKeyAuth.'