# TensorZero

**Canonical:** https://apis.io/providers/tensorzero/  
**Website:** https://www.tensorzero.com/  
**APIs profiled:** 0

TensorZero is an open-source, self-hosted LLMOps platform that unifies five capabilities behind one stack: a high-performance LLM Gateway that accesses every major model provider (Anthropic, OpenAI, AWS Bedrock/SageMaker, Azure, GCP Vertex, Mistral, Groq, xAI and more) through a single OpenAI-compatible API with sub-millisecond p99 overhead; Observability that stores inferences and feedback in your own database; Evaluation via heuristics and LLM judges; Optimization of prompts, models, and inference strategies from metrics and human feedback; and Experimentation with built-in A/B testing, routing, retries, and fallbacks. Written in Rust and deployed as a single Docker container, it plays nicely with the OpenAI SDK and OpenTelemetry. NOTE: as of 2026 TensorZero is no longer maintained — the source remains available on GitHub (all org repositories archived) and the final Python client (2026.6.0) is on PyPI, but the hosted product has wound down.

## Kin Score — 26.5 / 100 (thin)

Scored 2026-08-19 under rubric 0.12.0. Trend: flat (+1.3 from 25.2).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 54.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 8.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| 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).

## Security (2)

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

## Tags

Company, Ai Ml, LLM, LLMOps, AI Gateway, Inference, Observability, Open Source, Model Routing

---

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