---
title: "Get span by id"
method: GET
path: "/v1/observability/traces/{trace_id}/spans/{span_id}"
tags: ["beta.observability.traces"]
---

# Get span by id

`GET /v1/observability/traces/{trace_id}/spans/{span_id}`

## Request

- Base URL: `https://api.mistral.ai`
- URL: `https://api.mistral.ai/v1/observability/traces/{trace_id}/spans/{span_id}`
- Auth: HTTP bearer
- TypeScript: <https://skmtc.dev/mistral/apis/mistral-ai-api/docs/v1/observability/traces/:trace_id/spans/:span_id/get.ts> (a function with typed inputs; its response is checked against the schema)

Get span by id

## Path parameters

- `trace_id` string, required
- `span_id` string, required

## Query parameters

- `from` string, date-time, nullable
- `to` string, date-time, nullable

## Response `200`

Successful Response

- GetSpan
  - `customer_id` string, required
  - `organization_id` string, required
  - `workspace_id` string, required
  - `user_id` string, required
  - `trace_id` string, required
  - `span_id` string, required
  - `parent_span_id` string, required
  - `trace_state` string, required
  - `start_time` string, date-time, required
  - `end_time` string, date-time, required
  - `duration_ns` integer, required
  - `span_name` string, required
  - `span_kind` string, required
  - `service_name` string, required
  - `status_code` 'Error' | 'Ok' | 'Unset', required
  - `status_message` string, required
  - `error_type` string, required
  - `operation_name` string, required
  - `provider_name` string, required
  - `request_model` string, required
  - `response_model` string, required
  - `response_id` string, required
  - `output_type` string, required
  - `conversation_id` string, required
  - `data_source_id` string, required
  - `agent_id` string, required
  - `agent_name` string, required
  - `agent_version` string, required
  - `agent_description` string, required
  - `workflow_name` string, required
  - `prompt_name` string, required
  - `tool_name` string, required
  - `tool_type` string, required
  - `tool_call_id` string, required
  - `input_messages` string, required
  - `output_messages` string, required
  - `system_instructions` string, required
  - `tool_definitions` string, required
  - `tool_call_arguments` string, required
  - `tool_call_result` string, required
  - `request_choice_count` integer, required
  - `request_max_tokens` integer, required
  - `request_temperature` number, nullable, required
  - `request_top_p` number, nullable, required
  - `request_top_k` number, nullable, required
  - `request_presence_penalty` number, nullable, required
  - `request_frequency_penalty` number, nullable, required
  - `request_seed` integer, required
  - `request_stop_sequences` string[], required
  - `request_encoding_formats` string[], required
  - `response_finish_reasons` string[], required
  - `usage_input_tokens` integer, required
  - `usage_output_tokens` integer, required
  - `usage_cache_read_input_tokens` integer, required
  - `usage_cache_creation_input_tokens` integer, required
  - `resource_attributes` object, required
  - `span_attributes` object, required
  - `scope_name` string, required
  - `scope_version` string, required

## Other responses

- `400`: Bad Request - Invalid request parameters or data
- `404`: Not Found - Resource does not exist
- `408`: Request Timeout - Operation timed out
- `409`: Conflict - Resource conflict
- `422`: Unprocessable Entity - Validation error

## Changes

- **2026-10-12** `6c349f3bdef6`: 20 warning
  - added the new `OPTIMIZATION_NOT_FOUND` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `400`
  - added the new `OPTIMIZATION_NOT_FOUND` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `404`
  - added the new `OPTIMIZATION_NOT_FOUND` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `408`
  - added the new `OPTIMIZATION_NOT_FOUND` enum value to the `detail/error_code/anyOf[subschema #1: ObservabilityErrorCode]/` response property for the response status `409`
  - …16 more
- …earlier changes not shown

[Operation history](https://skmtc.dev/mistral/apis/mistral-ai-api/changes/v1/observability/traces/:trace_id/spans/:span_id/get.md)

---

[API](https://skmtc.dev/mistral/apis/mistral-ai-api.md) - [All operations](https://skmtc.dev/mistral/apis/mistral-ai-api/llms.txt) - [OpenAPI document](https://skmtc.dev/mistral/apis/mistral-ai-api/revisions/08a585fb75bc?raw)