spans changedapi/opentelemetry/spans
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7272### Content attributes
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74Attributes tagged with <Badge>Content</Badge> are only on spans in content mode, from the SDK and the API alike. See [how the content modes differ in the guide](https://platform.claude.com/docs/en/manage-claude/opentelemetry#choose-a-content-mode). When this content is too large, the SDK and the API [shorten it](https://platform.claude.com/docs/en/manage-claude/opentelemetry#content-limits) and set `anthropic.content.truncated` to `true`. If Anthropic's safeguards withhold content from a response, the API's spans don't include that content either.
74Attributes tagged with <Badge>Content</Badge> are only on spans in content mode, from the SDK and the API alike. See [how the content modes differ in the guide](https://platform.claude.com/docs/en/manage-claude/opentelemetry#choose-a-content-mode). When this content is too large, the SDK and the API shorten it to fit the [content limits](https://platform.claude.com/docs/en/manage-claude/opentelemetry#content-limits) and set `anthropic.content.truncated` to `true`. If Anthropic's safeguards withhold content from a response, the API's spans don't include that content either.
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7676The message attributes are JSON strings in the message format of the OpenTelemetry GenAI conventions. Each Anthropic content block becomes one GenAI conventions message part, on the Messages API and in Managed Agents message events such as `agent.message`:
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208208 * The [`anthropic.sessions.create`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-sessions-create) span, for the first turn of a session that was created with non-empty [`initial_events`](https://platform.claude.com/docs/en/api/beta/sessions/create#create.initial_events).
209209 * The [`anthropic.sessions.events.send`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-sessions-events-send) span for the request in which the event was sent, for a turn that started because of an event, for example a [`user.message`](https://platform.claude.com/docs/en/api/beta/sessions/events#beta_managed_agents_user_message_event) event.
210 * The [`anthropic.sessions.update`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-sessions-update) span, for a turn that resumes because the session budget was raised or removed through the request.
210 * The [`anthropic.sessions.update`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-sessions-update) span, for a turn that resumes because the request raises or removes the session budget.
211211 * The `anthropic.session.turn` span for the turn of [the agent that the session runs](https://platform.claude.com/docs/en/managed-agents/multiagent-orchestration) during which that agent started this turn, for a turn on another thread.
212212 * The `anthropic.session.turn` span for the turn that produced the reply, for a turn that starts because an agent on another thread replied, such as an agent that the primary agent called.
213213 * None, for any other turn, such as a turn that starts because a [workflow run](https://platform.claude.com/docs/en/managed-agents/workflow-runs) ended.
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440440Every SDK span for a request, including [`anthropic.messages.create`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-messages-create), [`anthropic.messages.count_tokens`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-messages-count-tokens), and [`anthropic.messages.batches.<method>`](https://platform.claude.com/docs/en/api/opentelemetry/spans#anthropic-messages-batches-method), has the following attributes:
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442| Attribute | Type | Description |
443| --------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
444| `gen_ai.conversation.id` | `string` | The conversation ID passed with the [`conversation_id` (typescript, java, php: `conversationId`; csharp: `ConversationId`; go: `option.WithOpenTelemetryConversationID()`) option](https://platform.claude.com/docs/en/manage-claude/opentelemetry/sdk#configure-the-sdk). Without one, the session thread ID on the Managed Agents requests that [Session attributes](https://platform.claude.com/docs/en/api/opentelemetry/spans#session-attributes) lists, and absent on other requests. |
445| `anthropic.<resource>.id` | `string` | One attribute for each ID in the request's path and one for the ID of an object that the method creates. The name comes from the path, in the singular, for example `anthropic.session.id` or `anthropic.session.thread.id`. |
446| `gen_ai.agent.id` | `string` | The agent ID, on the agent methods. |
447| `gen_ai.memory.store.id` | `string` | The memory store ID, on the memory store methods. |
448| `gen_ai.memory.record.id` | `string` | The memory ID, on the memory methods. |
449| `http.request.resend_count` | `int` | The number of times that the SDK resent the request, for any reason, such as a retry. Absent when the SDK didn't resend it. |
450| `error.type` | `string` | A failed call's [error type](https://platform.claude.com/docs/en/api/errors#http-errors), for example `rate_limit_error`. The HTTP status code, for example `502`, when the error response doesn't have an error type. `connection_error`, `client_timeout_error`, or `client_error` when the call failed in the SDK. `api_error` when the server ended a stream early. |
451| `server.address` | `string` | The host of the client's base URL, `api.anthropic.com` by default. On a cloud platform's client, that platform's host. |
452| `url.query` | `string` | The URL's query string, with only the query parameters that the endpoint defines. Absent when there are none. In metadata-only mode, absent when the query has a sensitive parameter, such as `email`. |
453| `url.full` | `string` | The URL, made of `url.scheme`, `server.address`, the port when the base URL has one, `url.path`, and `url.query`. In metadata-only mode, absent whenever that mode leaves out `url.query`. |
442| Attribute | Type | Description |
443| --------------------------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
444| `gen_ai.conversation.id` | `string` | The conversation ID passed with the [`conversation_id` (typescript, java, php: `conversationId`; csharp: `ConversationId`; go: `option.WithOpenTelemetryConversationID()`) option](https://platform.claude.com/docs/en/manage-claude/opentelemetry/sdk#configure-the-sdk). Without one, the session thread ID on requests to one session thread, and on the request in which the session tool runner sends a tool's result. Absent on other requests. |
445| `anthropic.<resource>.id` | `string` | One attribute for each ID in the request's path and one for the ID of an object that the method creates. The name comes from the path, in the singular, for example `anthropic.session.id` or `anthropic.session.thread.id`. |
446| `gen_ai.agent.id` | `string` | The agent ID, on the agent methods. |
447| `gen_ai.memory.store.id` | `string` | The memory store ID, on the memory store methods. |
448| `gen_ai.memory.record.id` | `string` | The memory ID, on the memory methods. |
449| `http.request.resend_count` | `int` | The number of times that the SDK resent the request, for any reason, such as a retry. Absent when the SDK didn't resend it. |
450| `error.type` | `string` | A failed call's [error type](https://platform.claude.com/docs/en/api/errors#http-errors), for example `rate_limit_error`. The HTTP status code, for example `502`, when the error response doesn't have an error type. `connection_error`, `client_timeout_error`, or `client_error` when the call failed in the SDK. `api_error` when the server ended a stream early. |
451| `server.address` | `string` | The host of the client's base URL, `api.anthropic.com` by default. On a cloud platform's client, that platform's host. |
452| `url.query` | `string` | The URL's query string, with only the query parameters that the endpoint defines. Absent when there are none. In metadata-only mode, absent when the query has a sensitive parameter, such as `email`. |
453| `url.full` | `string` | The URL, made of `url.scheme`, `server.address`, the port when the base URL has one, `url.path`, and `url.query`. In metadata-only mode, absent whenever that mode leaves out `url.query`. |
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