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HoldKit

MCP server · hosted · v0.1.0 · ai.peerfoundry/holdkit
Online · tested 7h agoNEW · 8h agoSeen in the registry 7h ago

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

Website ↗How to connect ↓

What it does

HoldKit is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

From the publisher's description, Electra Index matched it to one capability: payments. That makes it a candidate for tasks such as detect fraudulent transactions or reconcile payments.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES
Local installNO
Version0.1.0
PriceNot in the registry
First seen31 Oct 2026
Last checked7h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 7h ago (live check)

Hosted endpoint

  • https://holdkit.peerfoundry.ai/mcp streamable-http

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

MCP settings (Claude Desktop, Cursor and other MCP clients)

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

Live check

Electra Index connected to the hosted endpoint 7h ago

ONLINE HoldKit answered an MCP connection on 31 Oct 2026 and introduced itself as holdkit 0.1.0 (MCP protocol 2025-06-18).

14 tools offered to AI assistants

  • keys.create · Mint a pf_ caller key bound to one HoldKit namespace.
  • inbox.create · Create an inbox. Returns webhook and A2A URLs.
  • inbox.poll · Read inbox events after a cursor.
  • inbox.ack · Mark inbox events done.
  • inbox.wait · Poll an inbox. block_ms is accepted and capped at 0 in this MVP, so the call returns current events.
  • timer.set · Schedule a durable timer. Delivery URLs must be public https.
  • timer.cancel · Cancel a timer.
  • lock.acquire · Take a lease lock. Returns a fencing token.
  • lock.release · Release a lock with its fencing token.
  • idem.begin · Start an idempotency key or return the prior outcome. fingerprint is a hex hash.
  • 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.
  • kv.get · Read a small value.
Show 2 more
  • kv.set · Write a small value with a TTL. Emails and card numbers are rejected.
  • kv.delete · Delete a value.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Tasks it helps with

Share of each task's required capabilities it covers
Detect fraudulent transactions
Payments
50%
Reconcile payments
Payments
33%
Buy products online
Payments
33%
Handle refund requests
Payments
33%

Similar tools

Listed for the same task: detect fraudulent transactions
  • RevinhoREMOTELOCAL
    Read-only SaaS business intelligence from GA4, Stripe, and Google Search Console
  • mcpREMOTELOCAL
    Pay-per-query x402 business intelligence on Base, settled in USDC via the native 402 payment flow
  • DoorLoop MCP by usefulapiREMOTELOCAL
    Read DoorLoop properties, units, leases, tenants and payments; create tasks and task updates
  • e-Courier MCP by usefulapiREMOTELOCAL
    Read delivery orders, quotes, customers, drivers, manifests, invoices and payment records
  • Recurpay MCP by usefulapiREMOTELOCAL
    Read subscriptions, subscribers and orders; manage renewals, billing skips and payment links
  • Qashier MCP by usefulapiREMOTELOCAL
    Read checkout sessions; create payment links, expire sessions and refund payments in Qashier

Ready-made AI agents

An MCP server is a connector you add to your own assistant. These are finished products that do the same job for you:
All AI agents to detect fraudulent transactions, ranked →

Facts & evidence

Each fact shows where it was seen and when.
FactValueEvidenceSourceLast confirmed
Hosted endpointhttps://holdkit.peerfoundry.ai/mcpDECLAREDSRC-001 Official MCP Registry7h ago
Local install (package)noDECLAREDSRC-001 Official MCP Registry7h ago
Remote access (hosted)yesDECLAREDSRC-001 Official MCP Registry7h ago
Websitehttps://peerfoundry.ai/DECLAREDSRC-001 Official MCP Registry7h ago
Registry statusactiveDECLAREDSRC-001 Official MCP Registry7h ago
Version0.1.0DECLAREDSRC-001 Official MCP Registry7h ago
MCP serveryesDECLAREDSRC-001 Official MCP Registry7h ago

Change history

  • NEW31 Oct 2026
    first seen in the index

Is this page accurate?

Flag it and our robot re-checks the official source. Reports never change a score.

Do you run HoldKit? Know when it stops answering

For publishers · optional

Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

Monitor HoldKitLaunch offer $39.99 once, for life instead of $9.99/month · All plans

Monitoring never changes a score or a rank.

Are you the publisher of HoldKit?

Free · show your listing

An independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.

Announce it on LinkedInListed on Electra Index
<a href="https://electraindex.com/mcp/holdkit?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/holdkit" alt="Listed on Electra Index"></a>

Questions about HoldKit

How do I connect HoldKit?

Use the hosted endpoint https://holdkit.peerfoundry.ai/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does HoldKit offer?

When Electra Index connected on 31 Oct 2026, it listed 14 tools: keys.create, inbox.create, inbox.poll, inbox.ack, inbox.wait, timer.set, timer.cancel, lock.acquire and more. The full list is in "Live check" above.

Is HoldKit online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 7h ago.

What can I use HoldKit for?

Based on its description, it is most relevant to: detect fraudulent transactions, reconcile payments, buy products online, handle refund requests.