Claude
- Open Settings → Connectors and choose Add custom connector.
- Paste the MCP server URL above.
- If asked for an OAuth client ID under advanced settings, use
…. - Connect, then sign in.
Test every payment rail from your AI assistant.
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A remote MCP server that simulates payments end to end. Connect it to an assistant, ask for a payment, and watch it move through the same statuses a real one would.
One real example, start to finish: a CHAPS payment asked for in plain English. Everything shown is the sandbox engine's actual output.
You need an account on this sandbox. Sign-in happens in your browser the first time you connect.
….Run this once, then use /mcp to sign in.
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Any client that speaks Streamable HTTP with OAuth works, as long as its redirect URI is registered here:
Name a method, or leave it out and let the sandbox route by fastest or cheapest. Every payment result includes the scheme message the engine built for that rail. Limits and fees are sandbox values, not scheme rules.
| Method | Rail | Message built | Region | Currency | Creditor account | Settles | Sandbox limit | Also required |
|---|---|---|---|---|---|---|---|---|
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What an assistant can do once connected. Everything acts on your own simulated data.
Use these values to get a predictable outcome.
| Send this | On | What happens |
|---|---|---|
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