# One (slim)

> One, an MCP server by withone.ai, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Find, document and execute authenticated API calls across 700+ apps via one MCP server

- Full: https://www.anchorterminal.com/tools/withone-mcp.md (~500 tokens) · this version ~430 tokens · JSON https://www.anchorterminal.com/tools/withone-mcp.json · canonical https://www.anchorterminal.com/tools/withone-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

# One

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by withone.ai (https://withone.ai)
- Listed because: It's published in the registry under withone.ai, a namespace the registry only gives to whoever proves they control that domain. It's in real use: 1,086 npm downloads a week, 11 GitHub stars.
- What the official MCP registry says: Find, document and execute authenticated API calls across 700+ apps via one MCP server

## Facts

- MCP registry: `ai.withone/mcp` 2.0.0
- Endpoint: https://mcp.withone.ai/mcp (streamable HTTP)
- Package: npm `@withone/mcp` (stdio)
- Source: https://github.com/withoneai/mcp
- Website: https://withone.ai
- npm downloads a week: 1,086
- GitHub stars: 11
- Registry entry updated: 2026-09-30

## Tools

- Tools: the endpoint asks for credentials before listing them (checked 2026-10-04 22:21 UTC)

- JSON: https://www.anchorterminal.com/api/v1/tools/withone-mcp.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming