# Stream adapter preparation events (SSE)

POST

/v1/adapters/{adapterId}/prepare

```sh
curl --request POST \
  --url https://example.com/v1/adapters/example/prepare \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{}'
```

SSE stream (`text/event-stream`). Iterates the adapter factory’s `prepare(params)` async generator and emits each yielded `PrepareEvent` as an SSE `data:` frame — used for warmup progress on in-process adapters (model download, cache priming, etc.). Body carries adapter-specific `params` and is passed through unchanged. Returns 404 when the adapter id is unknown to the in-process factory registry, and 400 `bad-input` when the adapter has no `prepare()` implementation (e.g. remote model providers with nothing to download) or the deployment did not wire an `adapterFactories` binding.

## Authorizations

- **[bearerAuth](https://docs.kindgi.com/v0.1.8/reference/api.md#bearerauth)**

## Parameters

### Path Parameters

**adapterId**

required

string

AdapterId — stable string chosen by the deployment (e.g. `sandbox-primary`).

### Header Parameters

**Idempotency-Key**

string

\>= 1 characters

Caller-supplied idempotency key, scoped to the caller: the same key from someone else in the tenant is their own request (from 0.1.5). Retries with the same key return the original response byte-identical (per `docs/API-ROUTE-CONVENTIONS.md` §3.1). A retry sent while the first request still runs is answered `409 idempotency-key-in-flight` with `Retry-After`, on a runtime whose store holds keys (from 0.1.5); retry after it, and you get the first request’s answer. An answer that carries a secret (a new API key or public run token, a session token, a generated signing secret) isn’t kept: a retry gets `409 idempotency-key-replay-withheld`, with the first request’s status and when it succeeded (from 0.1.5).

## Request Body

application/json

object

**_key_**

additional properties

any

##### Examplegenerated

```json
{}
```

## Responses

### 200

SSE stream of `PrepareEvent` frames — adapter-specific payload shape.

application/json

string

##### Examplegenerated

```json
example
```

### 400

Adapter has no prepare() implementation, or adapter factories not wired.

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 401

Missing / malformed / expired / revoked bearer token.

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 404

No adapter registered with that id.

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

### 413

The request body is over the API’s limit (`request-too-large`; `details.maxBytes` says how much).

application/json

object

**error**

required

object

**code**

required

Stable machine-readable discriminant. Values match domain error codes (see `docs/API-ROUTE-CONVENTIONS.md` §4.3).

string

**message**

required

string

**details**

Optional, kind-specific.

object

**_key_**

additional properties

any

**requestId**

required

Server-assigned request id; also echoed via `X-Request-Id` header.

string

##### Examplegenerated

```json
{
  "error": {
    "code": "example",
    "message": "example",
    "details": {},
    "requestId": "example"
  }
}
```

## See also

- [`GET /v1/adapters/{adapterId}`: Fetch a wired adapter](https://docs.kindgi.com/v0.1.8/reference/api/operations/adaptersget.md)
- [`POST /v1/adapters/{adapterId}/test`: Run a kind-specific smoke probe against an adapter](https://docs.kindgi.com/v0.1.8/reference/api/operations/adapterstest.md)
- [Error code `request-too-large`](https://docs.kindgi.com/v0.1.8/reference/errors.md#request-too-large)
- [Every error code](https://docs.kindgi.com/v0.1.8/reference/errors.md)