Developers and AI agents
Market Invoice Data API
Market Invoice publishes its UK invoice finance provider data, compiled from public sources, as a read-only public API and as an MCP server for AI clients. The data is the same one behind the UK Invoice Finance Rate Index: provider terms (advance rate, service charge, minimum turnover, setup speed) and a current market snapshot. No authentication, no personal data, released under CC BY 4.0.
REST endpoints
Base URL https://marketinvoice.co.uk/api. All responses are JSON with open CORS, an ETag and edge caching. Full machine-readable contract: OpenAPI 3.1 spec.
| Method | Path | Description |
|---|---|---|
| GET | /api/providers | List all providers in the Rate Index. Optional filters: ?q=, ?cluster=, ?confidential=true, ?factoring=true. https://marketinvoice.co.uk/api/providers?cluster=fintech |
| GET | /api/providers/{slug} | Detail for one provider. Accepts the canonical slug or the short profile slug. https://marketinvoice.co.uk/api/providers/bibby |
| GET | /api/rates | Current market snapshot: advance-rate range plus the Bank of England base rate as a dated reference. https://marketinvoice.co.uk/api/rates |
MCP server
The same data is exposed as a remote Model Context Protocol server over streamable HTTP, so MCP-capable AI clients can read it directly.
- Endpoint:
https://marketinvoice.co.uk/mcp(JSON-RPC 2.0, POST) - Manifest: /.well-known/mcp.json
- Resources:
mi://dataset,mi://rates,mi://providers/{slug} - Tool:
search_providers(query?, cluster?, confidential_only?, factoring_only?)
Terms
Read-only and free under CC BY 4.0: attribute Market Invoice and link back to the Rate Index. Every figure comes from the Rate Index dataset, compiled from public sources. The Bank of England base rate is published with an explicit as_of date; verify against the Bank of England before relying on it. Please cache responses and avoid abusive request rates.