Letta Memory Blocks API
Core-memory blocks shared across agents, groups, and identities.
Letta Memory Blocks API is one of 49 APIs that Letta publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Memory Blocks. The published artifact set on APIs.io includes an OpenAPI specification.
This API exposes 9 operations across 6 paths, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.
Requests are made against 2 base URLs: https://api.letta.com/v1, http://localhost:8283/v1.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Letta Memory Blocks API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (bearerAuth).
By default, every request must be authenticated.
bearerAuth— API key created at https://app.letta.com/api-keys, passed as Authorization: Bearer YOURAPIKEY.
Paths & Operations 9
Across 6 paths, the API surfaces 9 operations — 1 DELETE, 4 GET, 3 PATCH, 1 POST. Each is listed below with its method, path, parameters, and response codes.
Core-memory blocks shared across agents, groups, and identities.
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are Block (11 properties), CreateBlockRequest (5 properties), Error (1 property), HTTPValidationError (1 property). 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.
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