Debugging

Inspect and debug running Rivet Actors, runners, and provider configs using management, runner, and actor inspector HTTP APIs.

Connecting to Rivet

All debugging endpoints in this guide are available both locally and in production. In local development, the base URL is http://localhost:6420 with no authentication. In production (Rivet Cloud or self-hosted), you connect to your Rivet Engine endpoint with a token.

Setup

All examples in this guide use these shell variables. Extract them from your RIVET_ENDPOINT (https://<namespace>:<token>@<host>):

# From RIVET_ENDPOINT=https://my-namespace:sk_abc123@api.rivet.dev
export RIVET_API="https://api.rivet.dev"
export RIVET_NAMESPACE="my-namespace"
export RIVET_TOKEN="sk_abc123"

# For local development:
# export RIVET_API="http://localhost:6420"

Rivet Cloud issues two token types: sk_ (secret key, server-side only) and pk_ (public key, client-safe). For debugging, always use sk_. See Endpoints for more details.

Management API

The management API runs on the manager base path (default root path) and is used to list, create, and look up actors.

Authentication

Environment	Authentication
Local development	No authentication required. All endpoints are accessible without tokens.
Self-hosted engine	Set `RIVET_TOKEN` to enable authenticated access to restricted endpoints like KV.
Rivet Cloud	Authentication is enforced by your deployment entrypoint. For manager KV access, use the manager token header below when enabled.

Restricted endpoints (like KV reads) require the x-rivet-token header when RIVET_TOKEN is configured:

curl "$RIVET_API/actors/{actor_id}/kv/keys/{base64_key}" \
  -H "x-rivet-token: $RIVET_TOKEN"

List Actors

# List all actors with a given name
curl "$RIVET_API/actors?name=my-actor&namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN"

# Look up one actor by key (name is required when key is provided)
curl "$RIVET_API/actors?name=my-actor&key=%5B%22my-key%22%5D&namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN"

# List actors by IDs (comma-separated)
curl "$RIVET_API/actors?actor_ids=id1,id2&namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN"

Rules:

key requires name.
actor_ids cannot be combined with name or key.

Returns:

{
  "actors": [
    {
      "actor_id": "abc123",
      "name": "my-actor",
      "key": "[\"default\"]",
      "namespace_id": "default",
      "create_ts": 1706000000000
    }
  ]
}

Create Actor

POST /actors creates a new actor.

curl -X POST "$RIVET_API/actors?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
    "name": "my-actor",
    "runner_name_selector": "default",
    "crash_policy": "restart"
  }'

Create or Get Actor

PUT /actors creates an actor if it does not exist, otherwise returns the existing one.

curl -X PUT "$RIVET_API/actors?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
    "name": "my-actor",
    "key": "[\"default\"]",
    "runner_name_selector": "default",
    "crash_policy": "restart"
  }'

Returns the actor object with its actor_id.

List Actor Names

curl "$RIVET_API/actors/names?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN"

Returns all registered actor names and their metadata.

Read Actor KV

Requires authentication (see above).

curl "$RIVET_API/actors/{actor_id}/kv/keys/{base64_key}" \
  -H "x-rivet-token: $RIVET_TOKEN"

Returns the value stored at the given key.

See the OpenAPI spec for the full schema of all management endpoints.

Runner API

Use the runner endpoints to debug scheduler capacity and provider configuration (for example serverless URL, headers, and limits) through the Rivet API.

List Runner Names

curl "$RIVET_API/runners/names?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN"

Returns the runner pools available in the namespace:

{
  "names": ["default", "gpu-workers"],
  "pagination": { "cursor": null }
}

List Runners in a Pool

curl "$RIVET_API/runners?namespace=$RIVET_NAMESPACE&name=default&include_stopped=true&limit=100" \
  -H "Authorization: Bearer $RIVET_TOKEN"

Useful fields when debugging:

remaining_slots / total_slots for capacity.
drain_ts and stop_ts for shutdown behavior.
last_ping_ts and last_connected_ts for connectivity.

Inspect Provider Config (Runner Config)

curl "$RIVET_API/runner-configs?namespace=$RIVET_NAMESPACE&runner_name=default" \
  -H "Authorization: Bearer $RIVET_TOKEN"

Returns the configured provider settings per datacenter and the latest pool error (if any):

{
  "runner_configs": {
    "default": {
      "datacenters": {
        "dc-1": {
          "serverless": {
            "url": "https://your-deployment.example.com/rivet",
            "headers": { "Authorization": "Bearer token" },
            "request_lifespan": 55,
            "slots_per_runner": 1,
            "max_runners": 10
          },
          "runner_pool_error": null
        }
      }
    }
  },
  "pagination": { "cursor": null }
}

runner_pool_error mirrors actor scheduling errors such as serverless_http_error, serverless_connection_error, and serverless_stream_ended_early.

Check Serverless Provider Health

Use this to test whether Rivet can reach your serverless provider URL and read runner metadata:

curl -X POST "$RIVET_API/runner-configs/serverless-health-check?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://your-deployment.example.com/rivet",
    "headers": {
      "Authorization": "Bearer token"
    }
  }'

Possible responses:

{ "success": { "version": "1.2.3" } }

{
  "failure": {
    "error": {
      "message": "non-success status from metadata endpoint",
      "details": "received status 503"
    }
  }
}

Refresh Provider Metadata

If you deploy new actor code or routes and metadata has not updated yet, force a refresh:

curl -X POST "$RIVET_API/runner-configs/default/refresh-metadata?namespace=$RIVET_NAMESPACE" \
  -H "Authorization: Bearer $RIVET_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{}'

Actor API

All actor-level endpoints are accessed through the gateway. The gateway routes requests to the correct actor instance using the actor ID in the URL path:

{RIVET_API}/gateway/{actor_id}/{path}

The gateway only accepts actor IDs, not names. Use GET /actors?name=... from the management API to look up actor IDs first.

Authentication

Standard actor endpoints (health, actions, requests) and inspector endpoints have separate authentication requirements.

Standard Endpoints

Environment	Authentication
Local development	No authentication required.
Self-hosted engine	The Rivet Engine handles authentication at the gateway level.
Rivet Cloud	Authentication is handled by the Rivet Cloud platform at the gateway level.

Inspector Endpoints

Environment	Authentication
Local development	No authentication required if `RIVET_INSPECTOR_TOKEN` is not set. A warning is logged.
Self-hosted engine	Set the `RIVET_INSPECTOR_TOKEN` environment variable. Pass it as a bearer token in the `Authorization` header. The actor-specific inspector token used by the standalone Inspector UI is also accepted.
Rivet Cloud	Token is required. Pass it as a bearer token in the `Authorization` header. The actor-specific inspector token used by the standalone Inspector UI is also accepted.

curl "$RIVET_API/gateway/{actor_id}/inspector/summary" \
  -H 'Authorization: Bearer YOUR_INSPECTOR_TOKEN'

Retrieving the Inspector Token (Rivet Cloud)

In Rivet Cloud, each actor generates a unique inspector token on first start and persists it in its internal KV store. The Rivet dashboard retrieves this token automatically, but if you need it for direct API access, fetch it from the management KV endpoint.

The inspector token is stored at internal KV key 0x03 (base64: Aw==). The response value is also base64-encoded.

# Fetch the inspector token for a specific actor
ACTOR_ID="your-actor-id"

RESPONSE=$(curl -s "$RIVET_API/actors/$ACTOR_ID/kv/keys/Aw==" \
  -H "x-rivet-token: $RIVET_TOKEN")

# Extract and decode the base64 value
INSPECTOR_TOKEN=$(echo "$RESPONSE" | jq -r '.value' | base64 -d)

# Use it to call inspector endpoints
curl "$RIVET_API/gateway/$ACTOR_ID/inspector/summary" \
  -H "Authorization: Bearer $INSPECTOR_TOKEN"

Standard Actor Endpoints

These are the built-in actor endpoints available through the gateway:

# Health check
curl $RIVET_API/gateway/{actor_id}/health

# Metadata
curl $RIVET_API/gateway/{actor_id}/metadata

# Call an action
curl -X POST $RIVET_API/gateway/{actor_id}/action/myAction \
  -H 'Content-Type: application/json' \
  -d '{"args": [1, 2, 3]}'

# Send queue message (body includes queue name)
curl -X POST $RIVET_API/gateway/{actor_id}/queue \
  -H 'Content-Type: application/json' \
  -d '{"name":"jobs","body":{"id":"job-1"}}'

# Send queue message (queue name in path)
curl -X POST $RIVET_API/gateway/{actor_id}/queue/jobs \
  -H 'Content-Type: application/json' \
  -d '{"body":{"id":"job-1"}}'

# Send queue message and wait for completion (optional timeout in ms)
curl -X POST $RIVET_API/gateway/{actor_id}/queue/jobs \
  -H 'Content-Type: application/json' \
  -d '{"body":{"id":"job-1"},"wait":true,"timeout":5000}'

# Forward an HTTP request to the actor's onRequest handler
curl $RIVET_API/gateway/{actor_id}/request/my/custom/path

Queue send responses include:

{ "status": "completed", "response": null }

If wait: true and the timeout is reached, status is "timedOut".

Inspector Endpoints

The inspector HTTP API exposes JSON endpoints for querying and modifying actor internals at runtime. These are designed for agent-based debugging and tooling.

Get State

curl $RIVET_API/gateway/{actor_id}/inspector/state

Returns the actor’s current persisted state:

{
  "state": { "count": 42, "users": [] },
  "isStateEnabled": true
}

Set State

curl -X PATCH $RIVET_API/gateway/{actor_id}/inspector/state \
  -H 'Content-Type: application/json' \
  -d '{"state": {"count": 0, "users": []}}'

Returns:

{ "ok": true }

Get Connections

curl $RIVET_API/gateway/{actor_id}/inspector/connections

Returns all active connections with their params, state, and metadata:

{
  "connections": [
    {
      "type": "websocket",
      "id": "conn-id",
      "details": {
        "type": "websocket",
        "params": {},
        "stateEnabled": true,
        "state": {},
        "subscriptions": 2,
        "isHibernatable": true
      }
    }
  ]
}

Get RPCs

curl $RIVET_API/gateway/{actor_id}/inspector/rpcs

Returns a list of available actions:

{ "rpcs": ["increment", "getCount"] }

Execute Action

curl -X POST $RIVET_API/gateway/{actor_id}/inspector/action/increment \
  -H 'Content-Type: application/json' \
  -d '{"args": [5]}'

Returns:

{ "output": 47 }

Get Queue Status

curl $RIVET_API/gateway/{actor_id}/inspector/queue?limit=10

Returns queue status with messages:

{
  "size": 3,
  "maxSize": 1000,
  "truncated": false,
  "messages": [
    { "id": 1, "name": "process", "createdAtMs": 1706000000000 }
  ]
}

Get Traces

Query trace spans in OTLP JSON format:

curl "$RIVET_API/gateway/{actor_id}/inspector/traces?startMs=0&endMs=9999999999999&limit=100"

Returns:

{
  "otlp": {
    "resourceSpans": [
      {
        "scopeSpans": [
          {
            "spans": [
              {
                "traceId": "abc123",
                "spanId": "def456",
                "name": "increment",
                "startTimeUnixNano": "1706000000000000000"
              }
            ]
          }
        ]
      }
    ]
  },
  "clamped": false
}

Get Workflow History

curl $RIVET_API/gateway/{actor_id}/inspector/workflow-history

Returns:

{
  "history": null,
  "isWorkflowEnabled": false
}

Get Database Schema

curl $RIVET_API/gateway/{actor_id}/inspector/database/schema

Returns discovered SQLite tables and views when the actor has c.db enabled:

{
  "schema": {
    "tables": [
      {
        "table": { "schema": "main", "name": "test_data", "type": "table" },
        "columns": [
          { "cid": 0, "name": "id", "type": "", "notnull": 0, "dflt_value": null, "pk": 0 }
        ],
        "foreignKeys": [],
        "records": 2
      }
    ]
  }
}

Get Database Rows

curl "$RIVET_API/gateway/{actor_id}/inspector/database/rows?table=test_data&limit=100&offset=0"

Returns paged rows for a specific SQLite table or view:

{
  "rows": [
    {
      "id": 1,
      "value": "Alice",
      "payload": "",
      "created_at": 1706000000000
    }
  ]
}

For workflow-enabled actors, history is a JSON object with nameRegistry, entries, and entryMetadata. Step outputs, loop state, and message payloads are decoded from CBOR into normal JSON values.

Replay Workflow From Step

Reset a workflow to a specific step and restart execution immediately. Omitting entryId replays the workflow from the beginning.

curl -X POST http://localhost:6420/gateway/{actor_id}/inspector/workflow/replay \
  -H 'Content-Type: application/json' \
  -d '{"entryId":"workflow-step-id"}'

Returns the same JSON shape as /inspector/workflow-history:

{
  "history": {
    "nameRegistry": ["step-one", "step-two"],
    "entries": [],
    "entryMetadata": {}
  },
  "isWorkflowEnabled": true
}

Summary

Get a full snapshot of the actor in a single request:

curl $RIVET_API/gateway/{actor_id}/inspector/summary

Returns:

{
  "state": { "count": 42 },
  "connections": [],
  "rpcs": ["increment", "getCount"],
  "queueSize": 0,
  "isStateEnabled": true,
  "isDatabaseEnabled": false,
  "isWorkflowEnabled": false,
  "workflowHistory": null
}

When workflow history is present in /inspector/summary, workflowHistory is returned as the same encoded byte array used by /inspector/workflow-history.

Get Metrics (Experimental)

curl $RIVET_API/gateway/{actor_id}/inspector/metrics

Returns in-memory metrics for the current actor wake cycle. Metrics are not persisted and reset when the actor sleeps and wakes again.

Includes counters for action_calls, action_errors, action_duration_ms, connections_opened, connections_closed, sql_statements, sql_duration_ms, and kv_operations.

Polling

Inspector endpoints are safe to poll. For live monitoring, poll at 1-5 second intervals. The /inspector/summary endpoint is useful for periodic snapshots since it returns all data in a single request.

OpenAPI Spec

The full OpenAPI specification including all management and actor endpoints is available:

In the repository at rivetkit-openapi/openapi.json
Served at /doc on the manager when running locally