PayPal MCP server, with a policy gate.
Payment rails deserve more than a raw API key in an agent's config. Gentkey fronts the official PayPal MCP server with explicit write grants and a full audit log of what every agent did — and was denied.
https://app.gentkey.com/mcpclaude.ai (web & mobile) · Claude Code · Cursor · any MCP clientWhat’s free, what needs a grant.
Reads: PayPal's tools ship fully write-gated — on payment rails, no vendor label is taken on faith.
Writes: Grant mcp-paypal.write and the connector opens; the grant can carry a max-writes-per-hour bound.
Gentkey proxies the official PayPal MCP server (https://mcp.paypal.com/mcp) — you get the vendor’s own tools, with custody, gating, and audit added in front.
| Grant | What it governs |
|---|---|
mcp-paypal.write | Every tool the official PayPal server exposes — orders, invoices, subscriptions, and reads too, until a curated read set lands |
Connect once, use everywhere.
Sign in at gentkey.com, add PayPal (oauth), then point each client at your endpoint. Every client completes a standard OAuth flow and lands in your Gentkey — your connections, nobody else’s.
claude.ai (web & mobile)
- Settings → Connectors
- Add custom connector
- Paste
https://app.gentkey.com/mcpand finish the OAuth prompt
Claude Code
claude mcp add --transport http \
gentkey https://app.gentkey.com/mcpCursor
// .cursor/mcp.json
{
"mcpServers": {
"gentkey": { "url": "https://app.gentkey.com/mcp" }
}
}Things agents do with PayPal here.
- List unpaid invoices older than 30 days.
- Create an invoice for $1,200 to acme@example.com for July consulting.
- What subscriptions were cancelled this month?
- Show today's completed orders.
Custody, gating, and audit — built in.
The model never sees a credential
Your PayPal token is encrypted at rest and injected server-side at call time. Your stored credential never enters a context window.
Writes need a grant
Anything that changes state needs a capability you granted explicitly — revoke it and the next call is denied.
A trail you can act on
Every decision is attributed to the agent that made it — allowed, denied, or denied by constraint.
Fair questions.
What stops an agent from spraying invoices?
The grant is the gate, and it can carry a max-writes-per-hour bound the policy gate enforces. Every invoice an agent creates — or is denied — lands in the audit log attributed to that agent.
What happens when an agent calls a PayPal write tool it hasn't been granted?
The call is denied at the gateway — nothing reaches PayPal — and the denial is recorded in the audit log along with the grant that would have authorized it, so you can decide deliberately instead of finding out later.
Where are my credentials stored?
Encrypted at rest (AES-256-GCM) on Gentkey's server and injected server-side at call time. No credential you store with Gentkey ever enters a model's context window or an agent's config file.
Can I use this from claude.ai's free plan?
Yes — and it's the strongest case for a gateway: free claude.ai accounts currently get a single custom connector, so pointing that one slot at Gentkey puts every connector you've linked behind it.
How do I revoke an agent's access?
Revoke the grant (the next write is denied) or revoke the agent's tokens entirely in one click. Other agents and their grants are untouched — no shared key to rotate.
Is Gentkey affiliated with PayPal?
No. Gentkey is an independent MCP gateway. Trademarks belong to their owners; where an official PayPal MCP server exists, Gentkey proxies it and adds custody, gating, and audit on top.
Often connected together.
Cut PayPal a smaller key.
Sign in, connect PayPal, and grant your first scoped capability in under a minute.