Letta Sources API
Manage data sources (files, URLs) used to populate agent archival memory.
Letta Sources API is one of 41 APIs that Letta publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 14 JSON Schema definitions.
Tagged areas include Sources. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, pricing, a changelog, and 14 JSON Schemas.
This API exposes 14 operations across 11 paths, and defines 15 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.
Requests are made against 3 base URLs: https://api.letta.com, https://app.letta.com, http://localhost:8283.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Letta Sources API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (bearerAuth).
By default, every request must be authenticated.
Paths & Operations 14
Across 11 paths, the API surfaces 14 operations — 2 DELETE, 9 GET, 1 PATCH, 2 POST. Each is listed below with its method, path, parameters, and response codes.
Manage data sources (files, URLs) used to populate agent archival memory.
Schemas 15
The contract defines 15 schemas that model the data the API accepts and returns. The most detailed are FileMetadata (16 properties), Passage (15 properties), Source (11 properties), EmbeddingConfig (10 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Letta 12
Other APIs Letta publishes across the network.
This is an independent, third-party profile of Letta Sources API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
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