---
title: "Reconnect session"
method: POST
path: "/v1/agents/sessions/{session_id}/reconnect"
tags: ["Sessions"]
---

# Reconnect session

`POST /v1/agents/sessions/{session_id}/reconnect`

## Request

- Base URL: `https://api.sandbase.ai`
- URL: `https://api.sandbase.ai/v1/agents/sessions/{session_id}/reconnect`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-API-Key`

Return the current Session and the product stream URL to reopen. Uses the agents.read scope.

## Response `200`

Reconnect instructions

- SessionReconnect
  - `session` Session, required
    - `id` string, required: Session ID (`ses_` prefix).
    - `object` 'agent.session', required
    - `agent` object, required: OpenAI-shaped snapshot of the effective Agent configuration (id, name, model, instructions, multi_agent, reasoning, service_tier, text, tools).
    - `agent_id` string, required
    - `agent_version` integer, required
    - `title` string, required
    - `model` string, required
    - `environment` object, required: Echo of the hosted execution context, kept for OpenAI SDK compatibility. It is not a Sandbox instance and needs no action from clients.
      - `id` string
      - `type` 'openai_hosted'
      - `skills` object[]
    - `metadata` object, required
    - `status` 'idle' | 'in_progress' | 'requires_action' | 'failed', required: Execution status. requires_action is not supported yet and surfaces as a 502 executor_contract_error.
    - `lifecycle_status` 'active' | 'archived', required
    - `sync_status` string, required
    - `execution_status` string, required
    - `failure` SessionFailure, required
      - `code` 'session_creation_rejected' | 'execution_failed' | 'model_authentication_failed' | 'model_rate_limited' | 'model_quota_exceeded' | 'context_limit_exceeded' | 'environment_connection_timeout' | 'runtime_unavailable' | 'model_request_failed' | 'model_configuration_rejected' | 'session_not_ready' | 'session_execution_unavailable' | 'session_configuration_unavailable' | 'session_snapshot_unavailable', required
      - `message` string, required
      - `action` string, required: Suggested next step, such as retry_later, inspect_history, create_new_session, check_model_account, or create_session_with_updated_model_provider.
      - `retryable` boolean
    - `row_version` integer, required
    - `required_actions` unknown[], required
      - unknown
    - `vault_ids` string[], required
    - `usage` object, nullable: Token usage; null until a turn reports usage.
    - `created_at` integer, required
    - `last_active_at` integer, required
    - `updated_at` integer, required
    - `archived_at` integer, nullable, required
    - `source` 'direct' | 'service' | 'schedule' | 'null', nullable
    - `source_id` string, nullable: Service or Schedule ID when source is service or schedule.
    - `source_failure_code` string
  - `stream_url` string, required: Path of the product stream, for example /v1/agents/sessions/{session_id}/events/stream.
  - `recovery` 'snapshot_then_live', required
  - `requires_authorization_header` true, required

## Other responses

- `401`: unauthorized: missing, malformed, or conflicting API key headers
- `402`: spending_limit_exceeded: API key spending limit or organization balance exhausted
- `403`: insufficient_scope (scoped key) or org_disabled
- `404`: not_found: the resource does not exist in this organization
- `502`: executor_rejected or executor_contract_error from the execution layer
- `503`: authorization_unavailable, admission_unavailable, executor_unavailable, storage_unavailable, or internal_error

---

[API](https://skmtc.dev/sandbase/apis/sandbase-api.md) · [All operations](https://skmtc.dev/sandbase/apis/sandbase-api/llms.txt) · [OpenAPI document](https://skmtc.dev/sandbase/apis/sandbase-api/revisions/d40df2467ba2?raw)