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Letta Templates API

Reusable agent templates for instantiation.

Letta Templates 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 Templates. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, pricing, a changelog, and 14 JSON Schemas.

This API exposes 21 operations across 17 paths. 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.

21 operations 17 paths 0 schemas 2 DELETE3 GET3 PATCH11 POST2 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
1.0.0
Base URL
https://api.letta.com
Authentication
HTTP Bearer
Contact
License
Resource Areas
1

Authentication & Security 1

Letta Templates API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (bearerAuth). By default, every request must be authenticated.

Paths & Operations 21

Across 17 paths, the API surfaces 21 operations — 2 DELETE, 3 GET, 3 PATCH, 11 POST, 2 PUT. Each is listed below with its method, path, parameters, and response codes.

Templates 21

Reusable agent templates for instantiation.

POST
/v1/templates/{project_id}/{template_version}/agents
Create Agents from Template
templates.createAgentsFromTemplate 2 params body → 201402
POST
/v1/templates/{template_version}/agents
Create Agents from Template
templates.createAgentsFromTemplateNoProject 1 param body → 201402
GET
/v1/templates
List Templates (Cloud-only)
templates.listTemplates 10 params → 200
POST
/v1/templates
Create Template (Cloud-only)
templates.createTemplateNoProject body → 201400
POST
/v1/templates/{template_name}/save
Save Template Version (Cloud-only)
templates.saveTemplateVersionNoProject 1 param body → 200400
POST
/v1/templates/{project_id}/{template_name}
Save Template Version (Cloud-only)
templates.saveTemplateVersion 2 params body → 200400
DELETE
/v1/templates/{project_id}/{template_name}
Delete Template (Cloud-only)
templates.deleteTemplate 2 params body → 200404
GET
/v1/templates/{project_id}/{template_version}/snapshot
Get Template Snapshot (Cloud-only)
templates.getTemplateSnapshot 2 params → 200
PUT
/v1/templates/{project_id}/{template_version}/snapshot
Set Current Template from Snapshot (Cloud-only)
templates.setCurrentTemplateFromSnapshot 2 params body → 200400404500
POST
/v1/templates/{project_id}/{template_version}/fork
Fork Template (Cloud-only)
templates.forkTemplate 2 params body → 200400
POST
/v1/templates/{project_id}
Create Template (Cloud-only)
templates.createTemplate 1 param body → 201400
DELETE
/v1/templates/{template_name}
Delete Template (Cloud-only)
templates.deleteTemplateNoProject 1 param body → 200404
PATCH
/v1/templates/{template_name}
Update Current Template from Agent File (Cloud-only)
templates.updateCurrentTemplateFromAgentFileNoProject 1 param body → 200400404500
PATCH
/v1/templates/{project_id}/{template_name}/name
Rename Template (Cloud-only)
templates.renameTemplate 2 params body → 200400404409
PATCH
/v1/templates/{project_id}/{template_name}/description
Update Template Description (Cloud-only)
templates.updateTemplateDescription 2 params body → 200400404
GET
/v1/templates/{project_id}/{name}/versions
List Template Versions (Cloud-only)
templates.listTemplateVersions 4 params → 200404
POST
/v1/templates/{project_id}/{template_name}/deployments/{deployment_id}/migrate
Migrate Deployment to Template Version (Cloud-only)
templates.migrateDeployment 3 params body → 200400404500
POST
/v1/templates/{template_name}/rollback
Rollback Template to Previous Version (Cloud-only)
templates.rollbackTemplateNoProject 1 param body → 200400404500
POST
/v1/templates/{project_id}/{template_name}/rollback
Rollback Template to Previous Version (Cloud-only)
templates.rollbackTemplate 2 params body → 200400404500
PUT
/v1/templates/{project_id}/{template_name}/agent-file
Update Current Template from Agent File (Cloud-only)
templates.updateCurrentTemplateFromAgentFile 2 params body → 200400404500
POST
/v1/legacy-templates/{templateId}/migrates
Migrate Template from Legacy Project (Cloud-only)
templates.legacyMigration 1 param body → 200400404

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

letta-templates-api-openapi.yml Raw ↑

Other APIs Letta publishes across the network.

Letta Code
Letta Admin API
Letta Agents API
Letta Archives API
Letta Blocks API
Letta Chat API
Letta Client-Side Access Tokens API
Letta Conversations API
Letta Device Storage API
Letta Embeddings API
Letta Environments API
Letta Feeds API
Where this information came from

This is an independent, third-party profile of Letta Templates 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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