One
One is an MCP server published by withone.ai, verified on MCP revision 2025-11-25; support for the current revision (2026-07-28) is not yet confirmed. Last verified 2026-08-20.
Does One support the current MCP specification (2026-07-28)?
Not yet confirmed. One is verified on revision 2025-11-25; we have not confirmed support for the current revision (2026-07-28) as of 2026-08-20.
Is One a first-party (official) MCP server?
Undetermined. We have not verified the publisher relationship for One (as of 2026-08-20).
How do I connect to One?
One is available via a hosted remote endpoint at https://mcp.withone.ai/mcp, the package npm:@withone/mcp, the official MCP Registry under ai.withone/mcp, the source repository at https://github.com/withoneai/mcp. Authentication: unknown. Transports: streamable-http.
Does One support MCP revision 2025-11-25?
Yes. One supports MCP revision 2025-11-25 (checked 2026-08-20).
Does One support MCP revision 2026-07-28?
No. One was checked against MCP revision 2026-07-28 and does not support it (checked 2026-08-20).
When were One's facts last verified?
2026-08-20. Each fact on this page links to the sources used to verify it.
Search, document and execute authenticated API calls across 500+ apps via one MCP server
Which MCP spec revisions does One support?
One has 2 verified spec-support records. Each row lists the revision, the verified status, the evidence URL, and the date that fact was last checked.
| Spec revision | Status | Last checked | Evidence |
|---|---|---|---|
| MCP 2025-11-25 | Supported | Source | |
| MCP 2026-07-28 | Not supported | Source |
How widely adopted is One?
Ranked #449 in The MCP 500 with Adoption Index 46.77 (snapshot , methodology v1).
| Measurement | Value | Source |
|---|---|---|
| Official MCP Registry | yes | API · |
| Docker MCP Catalog | no | API · |
| npm downloads (weekly) | 383 | API · |
| GitHub stars | 10 | API · |
| GitHub forks | 4 | API · |
| Last push | 2026-09-15T14:30:38Z | API · |
| Repository archived | no | API · |
Repository and package signals for One
Measured directly from the source registries, not asserted from a document. Each figure carries the date it was read; none of it affects the verified spec status above.
Repository as of
- Created
- Open issues
- 0
- Primary language
- TypeScript
- License (repository)
- MIT
- Continuous integration
- Present
- Tests
- None detected
- Security policy
- None
Declared topics: agents, ai-agents, apps, gemini-cli-extension, integrations, mcp, mcp-server, model-context-protocol, one — author-declared on the repository, not our taxonomy.
Package (npm) as of
- Latest version
1.2.4- Last published
- First published
- Releases
- 8
- License (package)
- MIT
- Maintainers
- 2
- Direct dependencies
- 7
- Unpacked size
- 56 KB
- Registry signature
- Signed
- Build provenance
- Attested
How was this verified, and what are the sources?
Verified · method: sdk-protocol-constant
· confidence 0.85 (Good).
- Official MCP Registry record for ai.withone/mcp at version 1.2.2 - lists remote endpoint https://mcp.withone.ai/mcp and repository https://github.com/withoneai/mcp - accessed
- npm registry metadata for @withone/mcp at published version 1.2.3, retrieved 2026-08-20 - declares a dependency on @modelcontextprotocol/sdk, which resolves to @modelcontextprotocol/sdk@1.30.0 - accessed
- Published artifact of @modelcontextprotocol/sdk@1.30.0, retrieved 2026-08-20 - the artifact declares LATEST_PROTOCOL_VERSION 2025-11-25 and carries no 2026-07-28 implementation. Read from the artifact itself, not from release notes - accessed