# Langtrace AI

**Canonical:** https://apis.io/providers/langtrace/  
**Website:** https://www.langtrace.ai  
**APIs profiled:** 3

Langtrace is an open-source, OpenTelemetry-based end-to-end observability platform for LLM applications, built by Scale3 Labs. It captures real-time traces, metrics, and evaluations for popular LLMs, agent frameworks, and vector databases. Traces are ingested via an OTLP/HTTP endpoint and a REST API exposes projects, prompt registry, and trace retrieval. Available as a free self-hosted deployment or as Langtrace Cloud.

## Kin Score — 37.5 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 37.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 53.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 25.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **Langtrace AI Projects API** — Project and API key management.
- **Langtrace AI Prompt Registry API** — Versioned prompt storage and retrieval.
- **Langtrace AI Traces API** — OpenTelemetry trace ingestion and retrieval.

## Agentic access (1)

- **Langtrace Agentic Access** — 5 operations · 4 acting

## Security (2)

- **Langtrace Authentication** — apiKey · 1 scheme
- **Langtrace Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Langtrace Plans Pricing**

## Tags

Artificial Intelligence, LLM, Observability, OpenTelemetry, Tracing, Open-Source

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/langtrace/). Scores are computed from the provider's own public artifacts under a published rubric.