> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tracelm.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# OTLP Mapping Contract

> Field-level mapping between OTLP traces and TraceLM observability v2 schema

Returns the canonical OTLP import/export mapping contract used by Phase 9 interoperability APIs.

## Auth

* `Authorization: Bearer <jwt>` or project-scoped `X-API-Key`

## Response

```json theme={null}
{
  "version": "phase9-otlp-v1",
  "direction": "otlp_to_observability",
  "trace_level": {},
  "span_level": {},
  "w3c_propagation": {
    "traceparent": "obs_correlations.correlation_type=w3c_traceparent",
    "tracestate": "obs_correlations.correlation_type=w3c_tracestate",
    "baggage": "obs_correlations.correlation_type=w3c_baggage"
  }
}
```