# Lemma

**Canonical:** https://apis.io/providers/uselemma/  
**Website:** https://www.uselemma.ai  
**APIs profiled:** 4

Lemma (uselemma.ai, Forge AI Labs, Inc., Y Combinator Fall 2025) is a production monitoring and observability platform for AI agents. Teams instrument agents with the Lemma tracing SDKs (TypeScript and Python) so every agent execution becomes one trace with LLM generations, tool calls, and app-logic spans as children; Lemma then surfaces silent semantic failures, groups recurring issues with root-cause analysis, sends signed incident webhooks, and exposes the whole surface — projects, traces, issues, and learn-agent artifacts — through the Lemma Platform API and an official remote MCP server so coding agents can pull the exact runs and errors they need and fix issues in place.

## Kin Score — 45.2 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 45.2).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 64.3 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 28.9 |
| Developer Ergonomics | 54.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 50.9 (agent-native)

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

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (4)

- **Lemma Artifacts API** — The Artifacts API from Lemma — 6 operation(s) for artifacts.
- **Lemma Issues API** — The Issues API from Lemma — 8 operation(s) for issues.
- **Lemma Projects API** — The Projects API from Lemma — 6 operation(s) for projects.
- **Lemma Traces API** — The Traces API from Lemma — 17 operation(s) for traces.

## MCP servers (1)

- **Lemma MCP Server** — Lemma operates an official remote MCP server at https://api.uselemma.ai/mcp (Streamable HTTP transport), authenticated with a project API key sent as an Authorization Bearer hea...

## Security (3)

- **Uselemma Authentication** — http · 1 scheme
- **Uselemma Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Uselemma Trust Center** — trust center published

## Tags

Company, Artificial Intelligence, AI Agents, Observability, Monitoring, Tracing, Developer Tools, B2B

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