# Neptune.ai

**Canonical:** https://apis.io/providers/neptune-ai/  
**Website:** https://neptune.ai/  
**APIs profiled:** 2

Neptune.ai is an experiment tracker for ML and foundation-model training. As of 2025, Neptune.ai is being acquired by OpenAI and the public pricing page redirects to the OpenAI announcement. Customers continue to use the Neptune Python client and REST API during the transition.

## Kin Score — 14.3 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 14.3).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (2)

- **Neptune.ai REST API** — The Neptune REST API backs the Neptune Python client. It exposes runs, projects, fields, and metadata logging. Authentication uses an API token from the user profile.
- **Neptune Scale API (foundation-model tier)** — Neptune Scale is the higher-throughput logging surface designed for foundation model training jobs. Same API-token authentication; SDK support in `neptune-scale`.

## Security (1)

- **Neptune Ai Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Neptune Ai Plans Pricing**

## Tags

ML, MLOps, Experiment Tracking, Foundation Models, Acquired

---

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