mahastrategies-com Free Preflight API

openapi: 3.2.0
info:
  title: Maha Strategies MPS Free Preflight API
  version: '0.1'
  description: 'The Maha Provenance Standard (MPS) API runs claim-level provenance audits over prose. Every factual claim in a passage is excerpted, tagged (VERIFIED, SOURCED, BOUNDARY, ILLUSTRATIVE, UNVERIFIED), and returned with a rationale and a recommended action — so agents and editors can verify before they publish.


    ## Local bridge (CLI)


    Install the open-source local bridge and point Claude Code, Cursor, or any MCP client at it:


    ```sh

    npm install -g @mahastrategies/maha-mcp-bridge

    maha login # verify and store your credential

    maha serve # start the stdio MCP server

    ```


    Raw rows and credentials stay local; only locally-redacted context reaches the agent''s cloud model.


    ## Authentication


    Commercial endpoints use bearer credentials:


    ```

    Authorization: Bearer mhaic_your_credential_here

    ```


    Credentials are shown **exactly once** at purchase. Store them in a secret manager; never commit them, log them, or place them in URLs. Each credential is scoped to the MPS audit capability only — it cannot touch any other service. Lost credentials cannot be recovered, only replaced.


    The free preflight endpoint (`POST /api/audit`) needs no credential and is limited per visitor per day.


    ## The credit system


    Paid audits are prepaid. Each successful audit consumes one `mps_audit_invocation` credit; failed audits are refunded automatically in the same ledger.


    When a credential runs out of credits, the API responds with **`402 Payment Required`**:


    ```json

    {

    "error": { "code": "payment_required", "message": "This prepaid credential has no audit credits remaining." },

    "purchase": { "href": "/mps/audit-access", "checkoutEndpoint": "/api/mps-credits/checkout", "unit": "mps_audit_invocation" }

    }

    ```


    Treat `402` as a routine signal, not an error: follow `purchase.href` to buy another pack, or call the checkout endpoint programmatically. Balances live in an append-only double-entry ledger — every grant, consumption, refund, and manual correction is a permanent, hash-chained row.


    ## Idempotency and webhook resilience


    **Requests**: every audit takes a `clientRequestId` you choose (8–120 characters). Retrying with the same id and the same text returns the original result with `idempotentReplay: true` — never a duplicate charge. The same id with *different* text returns `409 Conflict`. Safe retry loop: keep the same id until you get a terminal status.


    **Payments**: Stripe webhooks are processed exactly once. Each event id is claimed atomically in the same database transaction that moves credits, so a redelivered webhook can never double-credit a balance — duplicates get `200 OK` with `"duplicate": true` and change nothing. A crash between claim and grant rolls both back together. You never need to reconcile double-grants; the ledger cannot express them.'
  contact:
    name: Maha Strategies
    url: https://www.mahastrategies.com/contact
servers:
- url: https://www.mahastrategies.com
tags:
- name: Free Preflight
  description: Rate-limited public demo, no credential required.
paths:
  /api/audit:
    post:
      tags:
      - Free Preflight
      operationId: runFreePreflight
      summary: Run a free, rate-limited audit preflight
      description: No credential required. Limited per visitor per day; passages up to 6000 characters.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - text
              properties:
                text:
                  type: string
                  maxLength: 6000
                  description: Passage to audit.
      responses:
        '200':
          description: Audit result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AuditResult'
        '400':
          $ref: '#/components/responses/FlatError'
        '413':
          $ref: '#/components/responses/FlatError'
        '415':
          $ref: '#/components/responses/FlatError'
        '429':
          $ref: '#/components/responses/FlatError'
        '502':
          $ref: '#/components/responses/FlatError'
        '503':
          $ref: '#/components/responses/FlatError'
components:
  schemas:
    AuditClaim:
      type: object
      required:
      - excerpt
      - tag
      - rationale
      - action
      properties:
        excerpt:
          type: string
          description: Verbatim excerpt from the passage (6–25 words).
        tag:
          type: string
          enum:
          - VERIFIED
          - SOURCED
          - BOUNDARY
          - ILLUSTRATIVE
          - UNVERIFIED
        rationale:
          type: string
          maxLength: 1000
        action:
          type: string
          enum:
          - none
          - verify
          - cite
          - reword
          - remove
    AuditResult:
      type: object
      required:
      - mps_version
      - input_hash
      - claims
      properties:
        mps_version:
          type: string
          const: '0.1'
        input_hash:
          type: string
          description: SHA-256 of the audited passage.
        claims:
          type: array
          items:
            $ref: '#/components/schemas/AuditClaim'
  responses:
    FlatError:
      description: Error (free preflight uses a flat error string).
      content:
        application/json:
          schema:
            type: object
            required:
            - error
            properties:
              error:
                type: string
  securitySchemes:
    credential:
      type: http
      scheme: bearer
      description: MPS client credential (`mhaic_…`), issued once at purchase.