About ComputeFirst
ComputeFirst provides agent instructions and access to deterministic computation tools for tasks such as math, data transforms, dates, text, statistics, finance, and units. It is aimed at autonomous-agent users and pairs a selection skill with MCP and plain HTTP access, without requiring credentials.
Key features
- 01Catalog of deterministic computation tools
- 02Math, dates, text, statistics, and more
- 03Skill guides search, contract review, and execution
- 04Full MCP route and ChatGPT route
- 05No API key or signup required
Use cases
- 01Perform mathematical or unit calculations
- 02Transform data or process text
- 03Handle date, statistics, or finance calculations
MCP support
It provides a remote MCP service accessible over HTTP. The full route exposes gateway tools, while `/mcp/chatgpt` provides named operations.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://computefirst.net/mcpclaude mcp add --transport http 321zz321-computefirst https://computefirst.net/mcp{"mcpServers":{"321zz321-computefirst":{"type":"http","url":"https://computefirst.net/mcp"}}}Open in Cursor{"servers":{"321zz321-computefirst":{"type":"http","url":"https://computefirst.net/mcp"}}}Open in VS Code{"mcpServers":{"321zz321-computefirst":{"type":"http","url":"https://computefirst.net/mcp"}}}{"mcpServers":{"321zz321-computefirst":{"serverUrl":"https://computefirst.net/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
15| Parameter | Type | Required | Description |
|---|---|---|---|
| limit | integer | No | |
| query | string | Yes | |
| include_contract | boolean | No |
Details
From the project READMEComputeFirst agent skill
Instructions for Claude Code, Codex, Grok, and other autonomous agents to use ComputeFirst for deterministic computation: search → read the versioned contract → execute. Free, no API key or sign-up. Live-verified catalog: 456 tools (2026-10-16).
Install the Claude Code skill and MCP connection from this repository's marketplace:
/plugin marketplace add 321zz321/computefirst-skill
/plugin install computefirst@computefirst
Or add the MCP connection alone:
claude mcp add --transport http computefirst https://computefirst.net/mcp
Codex ~/.codex/config.toml:
[mcp_servers.computefirst]
url = "https://computefirst.net/mcp"
For Codex skill discovery, copy skills/computefirst/ into .agents/skills/computefirst/ or ~/.agents/skills/computefirst/, preserving references. Client setup and sources cover Claude Code, Cursor, VS Code, generic MCP clients, and plain HTTP.
Read the skill for selection rules, exact requests, limits, and six actual API results. AGENTS.md provides condensed guidance. The full MCP route exposes gateway tools; /mcp/chatgpt offers 40 named operations with smaller limits.
Verify with Node.js 22+ and network access:
node scripts/verify-examples.mjs
The script reads the documented requests/results directly and fails on drift. It also checks discovery and both MCP routes. No dependencies, credentials, or reporting calls. MIT license.
Comments
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