# Build conversation context from per-source specs

**POST /api/v1/projects/{id}/memory/retrieval/context-from-sources**

Assembles conversation context from an explicit, per-source-configured set of sources — each source declares its own retrieval mode (text, semantic, hybrid), metadata filter, and candidate count. Results are merged and de-duplicated across sources, optionally reranked, then formatted and budgeted like build_context. The project scope is carried by the route id path parameter and the org is derived from that project. Provide a non-empty query, the user_id whose memory to assemble, and a non-empty sources list.


## Servers
- https://agentengine.mongodb.com: https://agentengine.mongodb.com ()


## Authentication methods
- Bearer auth


## Parameters

### Path parameters

- **id** (string)
  Project ID



### Body: application/json (object)
Per-source context build request
- **format_style** (string)

- **include_memories** (boolean)

- **max_tokens** (integer)
  MaxTokens is the gross context-construction budget (not a fetch cost),
  interpreted like build_context: the server subtracts a 500-token formatting
  reserve, then greedily selects whole memory chunks that fit.

- **model_type** (string)

- **query** (string)

- **query_embedding** (array[number])

- **rerank** (boolean)
  Rerank reorders the merged results by a relevance rerank when available.

- **session_id** (string)

- **sources** (array[object])
  Sources is the explicit, per-source-configured set to search; the memory
  server enforces the count bounds (1..MAX_CONTEXT2_SOURCES), each source's
  top_k bounds, and the no-duplicate-source rule.

- **user_id** (string)

- **visibility** (string)



## Responses
### 406
Unsupported or malformed API version, an operation unavailable in the selected published contract, or an unacceptable representation (including unsupported media-type parameters or excluded SSE). Existing authentication, authorization, and rate-limit failures take precedence.

#### Body: application/json (object)
- **badRequestDetail** (object)
  Optional validation details defined by the standard error schema; API negotiation errors do not emit this field.

- **detail** (string)
  Human-readable error details.

- **error** (integer)
  HTTP status code.

- **errorCode** (string)
  Machine-readable error code.

- **parameters** (array[string])
  Request parameter names associated with the error; omitted when none apply.

- **reason** (string)
  HTTP status reason phrase.


### 200
Assembled context payload with per-source metadata

#### Body: application/json (object)
object
### 400
Invalid request body or missing user_id/query/sources

#### Body: application/json (object)
- **code** (string)

- **error** (string)

- **success** (boolean)


### 401
Missing or invalid credentials

#### Body: application/json (object)
- **code** (string)

- **error** (string)

- **success** (boolean)


### 403
Caller lacks read access to the project

#### Body: application/json (object)
- **code** (string)

- **error** (string)

- **success** (boolean)


### 500
Internal error

#### Body: application/json (object)
- **code** (string)

- **error** (string)

- **success** (boolean)


### 502
Memory service unreachable

#### Body: application/json (object)
- **code** (string)

- **error** (string)

- **success** (boolean)



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