AINumbers.co best execution API

openapi: 3.2.0
info:
  title: AINumbers.co Fintech Intelligence Suite best execution API
  version: 1.0.0
  description: '**1255 fintech intelligence tools** covering ISO 20022, A2A payments, CFPB §1033, EU AI Act, DORA, MiCA, AML/KYC, BaaS, DLT/tokenization, ESG/climate finance, agentic payments (AP2, ACP, x402, Visa TAP, Mastercard Agent Pay), PQC migration, sanctions screening, and OpenChainGraph v0.4 computation chains.


    ## Transport


    > **The live transport is MCP JSON-RPC 2.0 at `https://mcp.ainumbers.co/mcp` — not REST.**

    >

    > This OpenAPI file is a **descriptive data-room artifact** — a machine-readable index of all tools and their input/output schemas. The REST paths (`POST /v1/tools/{name}`) described here are a projection; they become functional only if the optional REST shim (Area 2 Path B) is deployed.

    >

    > To call tools today, connect via the official MCP client SDKs. TypeScript: `@modelcontextprotocol/sdk`. Python: `mcp`.


    ## Architecture


    All tools run **entirely client-side** (browser JavaScript). Zero PII. Zero server calls after page load. Deterministic, reproducible outputs. Licensed CC BY 4.0.


    OpenChainGraph v0.4 compute-binding nodes additionally run **server-side on the MCP Worker** and emit verifiable artifacts with `execution_hash` (WebCrypto SHA-256 over RFC 8785 canonical JSON).'
  contact:
    name: Post Oak Labs
    url: https://postoaklabs.com
    email: tim@postoaklabs.com
  license:
    name: CC BY 4.0
    url: https://creativecommons.org/licenses/by/4.0/
servers:
- url: https://ainumbers.co
  description: Static browser-based tool host (DreamHost). Tools run client-side — no REST gateway is active on this origin. See x-mcp for the live MCP endpoint.
tags:
- name: best execution
paths:
  /v1/tools/compute_best_execution_evidence_pack:
    post:
      operationId: compute_best_execution_evidence_pack
      summary: Best-Execution Evidence Pack
      description: 'Compiles a caller-declared best-execution monitoring evidence pack: the fill-weighted average price improvement in basis points across declared per-venue fills (2dp half-up), the declared negative-improvement venues in declared order, and a REVIEW_ITEM_FLAGGED / WITHIN_POLICY verdict. Declared fills only: per-venue fill counts and improvements are your declarations, never observations this page makes; it reads no order store, venue connection, or fill observer. Absent or invalid venue records fail closed and are named. Basis: Commission Delegated Regulation (EU) 2026/825 (order execution policies), applying from 12 February 2028. No network, no storage, no clock.


        **Tool URL:** https://ainumbers.co/tools/681-best-execution-evidence-pack.html

        **AP2/Policy Mandate export:** yes'
      tags:
      - best execution
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                venues:
                  type: array
                  description: 'Declared per-venue records: venue (non-empty string), fills (integer > 0), avg_improvement_bps (finite number).'
                  items:
                    type: object
                    properties:
                      venue:
                        type: string
                      fills:
                        type: number
                      avg_improvement_bps:
                        type: number
                    required:
                    - venue
                    - fills
                    - avg_improvement_bps
              required:
              - venues
      responses:
        '200':
          description: Successful tool execution result
          content:
            application/json:
              schema:
                type: object
                properties:
                  weighted_improvement_bps:
                    type:
                    - number
                    - 'null'
                  negative_venues:
                    type:
                    - array
                    - 'null'
                  overall:
                    type:
                    - string
                    - 'null'
                  trace:
                    type: string
                  domain_errors:
                    type: array
      x-mcp-tool-name: compute_best_execution_evidence_pack
      x-tool-url: https://ainumbers.co/tools/681-best-execution-evidence-pack.html
      x-source: manifest
      x-ap2-export: true
x-mcp:
  transport: MCP JSON-RPC 2.0 (streamable HTTP)
  endpoint: https://mcp.ainumbers.co/mcp
  protocol_version: '2025-11-25'
  authentication: none
  registry: co.ainumbers/tools (official MCP registry)
  note: Connect any MCP-compatible client (Claude, ChatGPT, custom agent) directly to this endpoint. The REST paths in this file are descriptive only — they do not exist on the live server unless the REST shim is deployed.