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No API products listed for Letter. View the APIs tab for developer resources.
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Agentic banking & MCP
→How the Model Context Protocol (MCP) fits next to open banking APIs—and why banks are adding MCP servers for AI assistants.
Institutions are starting to expose permissioned banking actions and data to AI clients via MCP, alongside traditional developer portals and PSD2-style APIs. Open Banking Tracker maps known MCP programs, ecosystem tools, and how consent and governance show up in agentic workflows.
Letter is listed here for open banking and API context. When we have confirmed MCP program details for this institution, they appear in this section automatically.
Letter Open Banking FAQ
Letter's direct API availability may be limited. However, you can often access Letter accounts through Open Banking aggregators like Plaid, Tink, or TrueLayer, which provide standardized connectivity to thousands of banks including Letter.
The easiest way to integrate with Letter is through an Open Banking aggregator. These services provide pre-built connections to Letter and handle authentication, data normalization, and compliance requirements on your behalf.
PSD2 compliance depends on Letter's operating jurisdiction. European banks must comply with PSD2, while banks in other regions follow their local Open Banking regulations. Check the compliance section above for specific certifications.
Through Open Banking APIs, you can typically access account balances, transaction history, account holder information, and in some cases initiate payments. The specific data available depends on Letter's API capabilities and the permissions granted by the account holder. All data access requires explicit customer consent.
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Letter Details
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