---
# @generated by sylphx-gen 0.1.0 from contracts@3118f36f16f799965338811e17ed3a9f565a9f136b14c95e9c94a1e21d42ea3e. Do not edit.
title: "Create a memory store"
description: "`agents.memory_stores.create` (POST /v1/{parent}/memory_stores): Creates a memory store."
type: reference
product: agents
summary: "Creates a memory store."
updated: 2026-09-28
nav: false
---

Creates a memory store.

**Not available yet.** Sylphx Agents is declared in the registry but no backend serves it: every call answers `501` with the problem code `UNIMPLEMENTED`.

- **Path** `POST https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/memory_stores`
- **Scope** `agents:write`
- **Effect** `write` — a successful call changes state.
- **Collection** [memory_stores](/docs/api/memory_stores)
- **Query** `memory_store_id`, `validate_only`

## Request

| Field | Type | What it is |
| --- | --- | --- |
| `parent` | `string` | The parent to create in. Required. |
| `memory_store_id` | `string` | The memory store id, the final name segment; the server assigns one when empty. |
| `memory_store` | `MemoryStore` | The memory store to create; only caller-writable fields are read. Required. |
| `validate_only` | `bool` | Validate and return the result without writing anything. |

### MemoryStore

| Field | Type | What it is |
| --- | --- | --- |
| `name` | `string` | `orgs/{org}/projects/{project}/envs/{env}/memory_stores/{memory_store}`. |
| `meta` | `ResourceMeta` | Resource metadata. |
| `spec` | `MemoryStoreSpec` | Desired state. Required. |

### ResourceMeta

| Field | Type | What it is |
| --- | --- | --- |
| `labels` | `map<string, string>` | Caller-writable, indexed labels (AIP-122 label rules). |
| `annotations` | `map<string, string>` | Caller-writable, unindexed annotations. |
| `display_name` | `string` | Caller-writable human-readable name. |

### MemoryStoreSpec

| Field | Type | What it is |
| --- | --- | --- |
| `description` | `string` | What the store is for, shown to agents; at most 1024 characters. |
| `scope` | `MemoryScope` | Whose memories are kept apart. Required. One of `project`, `agent`, `end_user`. |
| `retention` | `duration` | Memories older than this since their last update are deleted, 1d to 3650d; unset keeps them until deleted. |
| `agent_writes` | `bool` | Whether agents write memories themselves after each turn; otherwise only callers write them. |

## Response

| Field | Type | What it is |
| --- | --- | --- |
| `name` | `string` | `orgs/{org}/projects/{project}/envs/{env}/memory_stores/{memory_store}`. |
| `uid` | `string` | `mst_<cell><ulid>`; never reused. Output only. |
| `meta` | `ResourceMeta` | Resource metadata. |
| `spec` | `MemoryStoreSpec` | Desired state. Required. |
| `status` | `MemoryStoreStatus` | Observed state. Output only. |

### ResourceMeta

| Field | Type | What it is |
| --- | --- | --- |
| `generation` | `int64` | Increases by one on every change to `spec`. Output only. |
| `etag` | `string` | Strong ETag (AIP-154): changes on any change to spec, status, or metadata. Send it back as `If-Match` or `etag` to make Update and Delete conditional; a mismatch fails with ABORTED / 409 `ETAG_MISMATCH`. Output only. |
| `create_time` | `timestamp` | When the Resource was created. Output only. |
| `update_time` | `timestamp` | When the Resource last changed. Output only. |
| `delete_time` | `timestamp` | Set while the Resource is being deleted. Output only. |
| `labels` | `map<string, string>` | Caller-writable, indexed labels (AIP-122 label rules). |
| `annotations` | `map<string, string>` | Caller-writable, unindexed annotations. |
| `display_name` | `string` | Caller-writable human-readable name. |
| `creator` | `string` | The principal that created the Resource. Output only. |

### MemoryStoreSpec

| Field | Type | What it is |
| --- | --- | --- |
| `description` | `string` | What the store is for, shown to agents; at most 1024 characters. |
| `scope` | `MemoryScope` | Whose memories are kept apart. Required. One of `project`, `agent`, `end_user`. |
| `retention` | `duration` | Memories older than this since their last update are deleted, 1d to 3650d; unset keeps them until deleted. |
| `agent_writes` | `bool` | Whether agents write memories themselves after each turn; otherwise only callers write them. |

### MemoryStoreStatus

| Field | Type | What it is |
| --- | --- | --- |
| `observed_generation` | `int64` | The generation this status was computed from. Output only. |
| `conditions` | `Condition[]` | Ready, Reconciling, Stalled. Output only. |
| `memory_count` | `int64` | The number of memories. Output only. |
| `stored_bytes` | `int64` | Bytes stored, content and index together; the billed quantity. Output only. |

### Condition

| Field | Type | What it is |
| --- | --- | --- |
| `type` | `string` | The condition type, for example `Ready`. |
| `status` | `ConditionStatus` | Whether the condition holds. One of `true`, `false`, `unknown`. |
| `observed_generation` | `int64` | The generation this observation was made against. |
| `reason` | `string` | A machine-readable UpperCamelCase reason. |
| `message` | `string` | A customer-safe human-readable message. |
| `severity` | `Severity` | How severe a FALSE condition is. One of `info`, `warning`, `error`. |
| `transition_time` | `timestamp` | When `status` last changed. |

## Errors

- [`UNAUTHENTICATED`](/docs/api/errors/UNAUTHENTICATED) — No valid key or token was presented.
- [`PERMISSION_DENIED`](/docs/api/errors/PERMISSION_DENIED) — The key lacks the method's permission.
- [`UNKNOWN_FIELD`](/docs/api/errors/UNKNOWN_FIELD) — The request has a field the schema does not know.
- [`INVALID_FIELD`](/docs/api/errors/INVALID_FIELD) — A field failed validation.
- [`RESOURCE_ALREADY_EXISTS`](/docs/api/errors/RESOURCE_ALREADY_EXISTS) — A Resource with this name exists.
- [`IDEMPOTENCY_KEY_REUSED`](/docs/api/errors/IDEMPOTENCY_KEY_REUSED) — An Idempotency-Key was reused with another body.
- [`IDEMPOTENCY_IN_PROGRESS`](/docs/api/errors/IDEMPOTENCY_IN_PROGRESS) — The first call with this Idempotency-Key is still running.
- [`PLAN_LIMIT_REACHED`](/docs/api/errors/PLAN_LIMIT_REACHED) — The plan's limit is reached.

Every error arrives in the body [Errors](/docs/platform/errors) describes.

## Examples

**cURL**

```curl
curl -X POST "https://api.sylphx.com/v1/orgs/acme/projects/shop/envs/production/memory_stores" \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"spec":{"scope":"project"}}'
```

**TypeScript**

```ts
const response = await sylphx.agents.memoryStores.create({ memoryStore: { spec: { scope: 'project' } }, parent: 'orgs/acme/projects/shop/envs/production' })
```

**Rust**

```rust
let mut req = sylphx::agents::CreateMemoryStoreRequest::default();
req.memory_store = Some(sylphx::agents::MemoryStore {
    spec: Some(sylphx::agents::MemoryStoreSpec {
        scope: sylphx::agents::MemoryScope::Project,
        ..Default::default()
    }),
    ..Default::default()
});
req.parent = "orgs/acme/projects/shop/envs/production".to_string();
let response = sx.agents().memory_stores().create(req).await?;
```

**CLI**

```bash
sylphx agents memory-stores create --parent orgs/acme/projects/shop/envs/production --spec.scope project
```

**MCP**

```json
{ "method_id": "agents.memory_stores.create", "args": {"memory_store":{"spec":{"scope":"project"}},"parent":"orgs/acme/projects/shop/envs/production"} }
```