MCP server

FactGrid (Renamed to FactReason) Official

io.github.factgridai/factgrid

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Renamed to FactReason. Now published as io.github.factreason/factreason — please use that entry.

Website Source

At a glance

Type

MCP server

Publisher

factgrid.co.uk (verified by the MCP Registry)

Status

Working at last check

Tools

11

Token cost

About 3,504 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http factgrid https://factgrid.co.uk/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.factgrid]
url = "https://factgrid.co.uk/mcp"

Gemini CLI

{"mcpServers":{"factgrid":{"httpUrl":"https://factgrid.co.uk/mcp"}}}

Cursor

{"mcpServers":{"factgrid":{"url":"https://factgrid.co.uk/mcp"}}}

VS Code

{"servers":{"factgrid":{"type":"http","url":"https://factgrid.co.uk/mcp"}}}

Antigravity

agy mcp add factgrid https://factgrid.co.uk/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"factgrid","server_url":"https://factgrid.co.uk/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"factgrid","server_url":"https://factgrid.co.uk/mcp"}

Tools

• factreason_api_breaking_changes ~292 tokens
  Compare two versions of a third-party API and return breaking changes, including removed endpoints, parameter type changes, removed request body fields, and migration guides. Use factreason_package_upgrade_advisory for npm or PyPI packages.
• factreason_api_schema ~286 tokens
  Search exact request and response schemas for third-party API endpoints. Pass service alone to list its indexed endpoints, add query to narrow by path or operation, or use query alone across services; returns matches or nearest services. Uses metered access and does not modify source data. Prefer fa
• factreason_auth_playbook ~264 tokens
  Get publisher-declared authentication schemes, scopes, rate-limit headers, and error codes for one third-party API. Returns a structured playbook or nearest service suggestions, and marks undocumented details as unstated rather than guessing. Uses metered access. Prefer factreason_integration_brief
• factreason_component_spec ~385 tokens
  Look up electronics component pin assignments, voltage range, package, and alternatives. Pass exact partNumber for one component or query for a capability search; partNumber takes precedence if both are supplied. For exact lookups, set responseFormat="compact" for tokenizer-measured context savings;
• factreason_create_key Changes accounts · ~275 tokens
  Get a FactReason API key for yourself, instantly, with no human, no signup and no card. Returns a key carrying one-off trial credit that you can spend immediately on any tool. CALL THIS FIRST if you have no key, or as soon as any FactReason tool returns HTTP 402 Payment Required — then retry the ori
• factreason_create_topup_link ~272 tokens
  Create a Stripe Checkout URL for adding prepaid credit to the calling Bearer API key. This creates an external checkout session but does not charge a card. You CANNOT COMPLETE THE PAYMENT YOURSELF, so return the URL to a human, and credit is applied only after they complete payment. Use after HTTP 4
• factreason_deprecation_scan ~301 tokens
  Scan publisher specifications for deprecated endpoints or parameters, sunset dates, and replacement operations. Omit filters for the catalogue-wide view, pass service to limit one API, and add endpoints to check selected paths. Uses metered access when findings exist. Use factreason_api_breaking_cha
• factreason_discover_api ~252 tokens
  Find third-party APIs for a capability when the provider is unknown. Supply a concise capability such as "sms" or "manage DNS"; returns ranked services, example endpoints, and a next step. Uses metered access. When the provider is already known, call factreason_integration_brief instead.
• factreason_integration_brief ~374 tokens
  Compile one callable third-party API brief: base URL, auth scheme, required parameters and types, request body, and documented response codes. Service is required and endpoint optionally narrows the operation. Set responseFormat="compact" for tokenizer-measured context savings; the backward-compatib
• factreason_package_upgrade_advisory ~482 tokens
  Compare two exact published npm or PyPI versions and return publisher-declared registry metadata changes, including yanks, exports, module format, runtime floors, peers, and licences, with before/after evidence. Set responseFormat="compact" for tokenizer-measured context savings; the backward-compat
• factreason_subscribe_spec_changes ~321 tokens
  Create a persistent specification watch for one service; a Bearer API key is required and each key may hold up to 50 watches. Without webhookUrl, read future events from the polling endpoint; with a public HTTP(S) URL, FactReason sends signed POST callbacks after later spec changes. Duplicate or uns

Browse

• GitHub tools
• Stripe tools
• Domains and DNS
• Email
• SMS and text messages
• Payments

Related MCP servers

• Partreel
  Verified KiCad footprints, symbols & 3D models for AI agents. No signup, CC-BY-4.0, quality-gated.
• Dropyour
  Publish micro-apps from your AI with no account; operate them as real apps. Data stored in the EU.
• Valet
  Get share links, publish and manage websites, artifacts and agents. No account needed.
• PeopleMCP
  Semantic search for people, projects and AI agents by task, skills and collaboration needs.
• oriiion
  Your marketing, a message away
• CostBench
  Verified pricing, hidden costs, negotiation data, price changes & TCO for 3,390+ software products.
• AgentTask Atlas
  Read-only catalog of verified MCP servers and Agent Skills by dev task, with practical verdicts.
• Rumoro
  Track what people say about your product on Reddit, X, Hacker News, GitHub and more

Badge for your README

[![AptLynx](https://aptlynx.net/badge/io.github.factgridai/factgrid.svg)](https://aptlynx.net/servers/io.github.factgridai/factgrid)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents