AINumbers MCP Apps Server

An agent calling a fintech tool by name has no way to know if the tool actually ran the math it claims to have run. This server closes that gap for the AINumbers.co suite: every tool call is deterministic, zero PII, and served straight from the suite's own single-file HTML, not a paraphrase of it.

An MCP Apps (SEP-1865) server that exposes the AINumbers.co fintech tool suite to any MCP host, including Claude, ChatGPT, M365 Copilot, VS Code, and Cursor.

Quick start

# Claude: Settings -> Connectors -> Add custom connector
https://mcp.ainumbers.co/mcp

# Inspector
npx @modelcontextprotocol/inspector   # then Streamable HTTP -> the URL above

No auth, no API key, no account. Production runs on Cloudflare Workers (/healthz reports runtime: cloudflare-workers), so there are no cold starts. Cursor and other Open Plugins directories pick this repo up automatically via the root .mcp.json, which declares the same endpoint.

Live endpoint: https://mcp.ainumbers.co/mcp (streamable HTTP) · Docs: ainumbers.co/mcp.html · Registry: co.ainumbers/tools on the Official MCP Registry

Run your own (org-hosted)

Fork this repo and deploy the button above to run the same server inside your own Cloudflare account: no auth to add, no build step at deploy time, the Worker boots straight from the data/ and kernels/ already committed here.

Two edits to wrangler.jsonc before that first deploy will succeed on a fresh account:

• routes points at mcp.ainumbers.co, a zone this fork doesn't own. Rename name and either delete routes (ship on the free workers.dev subdomain) or point it at a zone in your own account.
• queues / workflows feed an internal analytics loop and are guarded in code (if (env.EVENTS_QUEUE), if (env.RENEWAL_WATCH_WORKFLOW)) — the MCP handshake and every tool call work without them. Queues need a Workers Paid plan; drop both blocks to stay free-tier.

Everything else, including the ASSETS binding serving the committed tool data, works unmodified. Full write-up (WAF rate-limit recipe, re-vendor cadence, conformance-attestation offer): ainumbers.co/mcp.html#deploy-your-own.

Tools

Read-only MCP tools — count intentionally not hardcoded here (it drifted stale the last time it was). See data/counts.json for the live figure; never hand-type this number, scripts/surface-parity.mjs and the site repo's count-drift gate both check against it. Fifteen tools render as interactive widgets, the rest are ChainGraph compute nodes plus a handful of catalog and discovery utility tools: list_ainumbers_tools, find_tool, find_chain, build_workflow_links, run_chain, verify_execution_hash, build_chaingraph, emit_chaingraph_artifact, build_session_receipt.

Every tool declares readOnlyHint: true. No account, no auth, zero PII, nothing mutates state.

The 15 flagship widgets

Each renders as the actual single-file AINumbers tool, served as a text/html;profile=mcp-app resource and driven by the AIN Bridge (prefill, run, Policy Mandate export):