HoldKit

ai.peerfoundry/holdkitVersion 0.1.0

Idempotency keys, locks, timers, and inboxes for agents over MCP. No payments.

Status

Responds222 msNov 14, 2026, 13:32 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:32 UTC
Latency: 222 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://holdkit.peerfoundry.ai/mcpResponds222 msNov 14, 2026, 13:32 UTC

No sign-in

Claude Code

claude mcp add --transport http holdkit https://holdkit.peerfoundry.ai/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: holdkit
Remote MCP server URL: https://holdkit.peerfoundry.ai/mcp

Cursor

{
  "mcpServers": {
    "holdkit": {
      "url": "https://holdkit.peerfoundry.ai/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"holdkit","type":"http","url":"https://holdkit.peerfoundry.ai/mcp"}'

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Tools

14 tools

Tools of HoldKit
	Description		Read-only	Idempotent	Open world
`idem.begin`Start an idempotency key or return the prior outcome. fingerprint is a hex hash. Call keys.create once. Pass caller_key on every later tools/call.	Start an idempotency key or return the prior outcome. fingerprint is a hex hash. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared
`idem.commit`Store the outcome reference for an idempotency key. scope (max 64) and owner are optional. When owner is omitted, the caller key hash is sent. Call keys.create once. Pass caller_key on every later tools/call.	Store the outcome reference for an idempotency key. scope (max 64) and owner are optional. When owner is omitted, the caller key hash is sent. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared
`inbox.ack`Mark inbox events done. Call keys.create once. Pass caller_key on every later tools/call.	Mark inbox events done. Call keys.create once. Pass caller_key on every later tools/call.	Yes	No	Not declared	Not declared
`inbox.create`Create an inbox. Returns webhook and A2A URLs. Call keys.create once. Pass caller_key on every later tools/call.	Create an inbox. Returns webhook and A2A URLs. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared
`inbox.poll`Read inbox events after a cursor. Call keys.create once. Pass caller_key on every later tools/call.	Read inbox events after a cursor. Call keys.create once. Pass caller_key on every later tools/call.	No	Yes	Not declared	Not declared
`inbox.wait`Poll an inbox. block_ms is accepted and capped at 0 in this MVP, so the call returns current events. Call keys.create once. Pass caller_key on every later tools/call.	Poll an inbox. block_ms is accepted and capped at 0 in this MVP, so the call returns current events. Call keys.create once. Pass caller_key on every later tools/call.	No	Yes	Not declared	Not declared
`keys.create`Mint a pf_ caller key bound to one HoldKit namespace. The raw key is shown once. Pass this key on every later tools/call. Send it as the caller_key argument.	Mint a pf_ caller key bound to one HoldKit namespace. The raw key is shown once. Pass this key on every later tools/call. Send it as the caller_key argument.	No	No	Not declared	Not declared
`kv.delete`Delete a value. Call keys.create once. Pass caller_key on every later tools/call.	Delete a value. Call keys.create once. Pass caller_key on every later tools/call.	Yes	No	Not declared	Not declared
`kv.get`Read a small value. Call keys.create once. Pass caller_key on every later tools/call.	Read a small value. Call keys.create once. Pass caller_key on every later tools/call.	No	Yes	Not declared	Not declared
`kv.set`Write a small value with a TTL. Emails and card numbers are rejected. Call keys.create once. Pass caller_key on every later tools/call.	Write a small value with a TTL. Emails and card numbers are rejected. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared
`lock.acquire`Take a lease lock. Returns a fencing token. Call keys.create once. Pass caller_key on every later tools/call.	Take a lease lock. Returns a fencing token. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared
`lock.release`Release a lock with its fencing token. Call keys.create once. Pass caller_key on every later tools/call.	Release a lock with its fencing token. Call keys.create once. Pass caller_key on every later tools/call.	Yes	No	Not declared	Not declared
`timer.cancel`Cancel a timer. Call keys.create once. Pass caller_key on every later tools/call.	Cancel a timer. Call keys.create once. Pass caller_key on every later tools/call.	Yes	No	Not declared	Not declared
`timer.set`Schedule a durable timer. Delivery URLs must be public https. Call keys.create once. Pass caller_key on every later tools/call.	Schedule a durable timer. Delivery URLs must be public https. Call keys.create once. Pass caller_key on every later tools/call.	No	No	Not declared	Not declared

Details

Registry status: Active
Published: Oct 31, 2026
Updated: Oct 31, 2026
Website: https://peerfoundry.ai/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Communication Data and analyticsSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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