---
title: "Server-Sent Events stream of canonical card changes."
method: GET
path: "/agents/{agent_id}/stream"
tags: ["Notifications"]
---

# Server-Sent Events stream of canonical card changes.

`GET /agents/{agent_id}/stream`

## Request

- Base URL: `https://api.mnemom.ai/v1`
- URL: `https://api.mnemom.ai/v1/agents/{agent_id}/stream`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-Mnemom-Api-Key`

Returns a `text/event-stream` connection. Each new `card_attestations` row for the agent emits a `card_changed` SSE frame. Per-connection cap of 5 minutes; clients reconnect with `Last-Event-ID` (the log_index of the last seen frame) to resume. cards-as-primitive Phase 5 C1.

## Path parameters

- `agent_id` string, required

## Query parameters

- `since` integer

## Headers

- `Last-Event-ID` integer

## Response `200`

SSE stream (`text/event-stream`). Each frame is `event: card_changed\nid: <log_index>\ndata: {...}\n\n`.

## Other responses

- `400`: Bad request
- `401`: Authentication required
- `404`: Resource not found
- `429`: Rate-limit exceeded. The global per-IP limiter (100 requests/minute, applied to every `/v1/*` route) rejected this request. Back off until the window resets — `Retry-After` carries the cooldown in seconds and `X-RateLimit-Reset` the absolute reset time.
- `500`: Server error — request was well-formed but the server failed to fulfill it. Typically a downstream dependency (DB / RPC / external API) returned an unexpected error.

---

[API](https://skmtc.dev/mnemom/apis/mnemom-api.md) · [All operations](https://skmtc.dev/mnemom/apis/mnemom-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mnemom/apis/mnemom-api/revisions/274b7a6ea182?raw)