# Humanloop

**Canonical:** https://apis.io/providers/humanloop/  
**Website:** https://humanloop.com  
**APIs profiled:** 7

Humanloop was an LLM development platform for managing prompts, datasets, evaluations, and production observability of LLM applications, used by AI product teams at companies like Duolingo and Gusto. The platform offered a collaborative prompt editor, versioned prompts and tools, evaluation runs (LLM-as-judge and code-based), dataset management, online evaluators, and full request logging across OpenAI, Anthropic, Google, and other providers, with Python and TypeScript SDKs and a REST API. In 2025 the Humanloop team was acquired by Anthropic and the company has announced it is sunsetting the standalone platform; an official migration guide is published for existing customers. This record captures the historical API surface for archival and discovery purposes.

## Kin Score — 38.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 38.9).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 51.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| 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 |

## Access

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

## APIs (7)

- **Humanloop LLM Platform API** — The Humanloop REST API and SDKs covered prompts, tools, datasets, evaluations, evaluators, and logs for LLM applications. Developers called prompt endpoints from production to c...
- **Humanloop Datasets API** — The Datasets API from Humanloop — 2 operation(s) for datasets.
- **Humanloop Evaluators API** — The Evaluators API from Humanloop — 2 operation(s) for evaluators.
- **Humanloop Logs API** — The Logs API from Humanloop — 2 operation(s) for logs.
- **Humanloop Prompts API** — The Prompts API from Humanloop — 4 operation(s) for prompts.
- **Humanloop Sessions API** — The Sessions API from Humanloop — 2 operation(s) for sessions.
- **Humanloop Tools API** — The Tools API from Humanloop — 2 operation(s) for tools.

## Agentic access (1)

- **Humanloop Agentic Access** — 20 operations · 8 acting

## Security (2)

- **Humanloop Authentication** — apiKey/http · 2 schemes
- **Humanloop Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Humanloop Plans Pricing**

## Tags

LLM Platform, Prompt Management, Evaluations, LLMOps, Observability, Datasets, Prompts, Tools, Logs, Multi-Provider, Sunsetting, Acquired

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