SumUp
About
Build card present and online payments solutions with SumUp.
Details
- Author
- sumup
- Categories
- Developer Tools, Other, API
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Setup
Install SumUp in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/sumup/sumup-mcp
Follow the installation instructions in the repository README, then restart your MCP client.
This package runs as a Cloudflare Worker and serves the MCP transport for SumUp.
Authentication follows the MCP OAuth resource-server flow:
- The worker publishes protected resource metadata that points clients to the SumUp authorization server.
- Clients sendAuthorization: Bearer <access-token>to/mcp.
- Bearer tokens must be JWT access tokens issued bySUMUP_AUTH_HOSTand valid for the worker resource URL.
SumUp API keys such assup_sk_...are not valid Bearer tokens for the hosted server.
The worker exposes/mcpfor Streamable HTTP and/ssefor the legacy SSE transport. Both routes are pinned to a Durable Object so MCP session state survives across requests within the same Worker deployment.
Any client that speaks the Streamable HTTP transport can connect to this server. For example, usingmcp-remote:
{ "mcpServers": { "sumup": { "command": "npx", "args": [ "mcp-remote", "https://mcp.sumup.com/mcp", "--headers", "Authorization: Bearer <your-access-token>" ] } } }
Replace<your-access-token>with an OAuth access token issued for the MCP resource. OAuth-capable clients can discover the authorization server from the protected resource metadata instead of requiring a token to be configured manually.
Development setup, local testing, and contributor workflow live inCONTRIBUTING.md.
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