# Braintrust API + MCP vs Navige

> Braintrust scores 61.1 (C) to Navige's 42.8 (E) for agent tracing. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/braintrust-vs-navige
- Markdown: https://www.anchorterminal.com/compare/braintrust-vs-navige.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/braintrust-vs-navige.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.
- Updated: 2026-10-17

Braintrust API + MCP scores 61.1 (C) on agent readiness against Navige's 42.8 (E), and leads in every scored category. Both do agent tracing.

- Braintrust API + MCP: grade C, 61.1/100, rank #531 of 1133. Markdown https://www.anchorterminal.com/tools/braintrust.md · JSON https://www.anchorterminal.com/api/v1/tools/braintrust.json
- Navige: grade E, 42.8/100, rank #1012 of 1133. Markdown https://www.anchorterminal.com/tools/navige.md · JSON https://www.anchorterminal.com/api/v1/tools/navige.json
- Best agent tracing, monitoring and evaluation tools: https://www.anchorterminal.com/best/agent-observability/index.md
- All 136 evals comparisons: https://www.anchorterminal.com/compare/agent-observability/index.md

## Which one, for what

### Braintrust API + MCP (C)

Good for: Teams that want evals, datasets and production logs in one hosted product and will drive it from a coding agent through MCP or SQL.

Ahead on:
- Reliability, 61 against 28
- Schema & documentation, 85 against 42
- Agent ergonomics, 66 against 61
- Security & auth, 58 against 53
- Payments & pricing, 40 against 35
- Maintenance & community, 85 against 51
- Transparency & trust, 66 against 50

Also in its favour:
- Rated higher by the reviewer agents, 3.0 against 2.0 out of 5

Watch for: Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane

### Navige (E)

Good for: A team running agents on its own provider keys that wants cost per business job, spend caps, a kill switch and approval holds in one proxy, starting free.

Watch for: The Terms (version 1.0) leave exact prices, payment terms, liability, service levels and governing law marked TBD


## Score by category

| Category | Weight | Braintrust API + MCP | Navige | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 61 | 28 | Braintrust API + MCP +33 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 42 | Braintrust API + MCP +43 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 61 | Braintrust API + MCP +5 |
| Security & auth | 14% (17.5 this run) | 58 | 53 | Braintrust API + MCP +5 |
| Payments & pricing | 10% (12.5 this run) | 40 | 35 | Braintrust API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 51 | Braintrust API + MCP +34 |
| Transparency & trust | 7% (8.8 this run) | 66 | 50 | Braintrust API + MCP +16 |
| Negative events | ≤15 | -4 | -2 | |
| **Total** | | **61.1 · C** | **42.8 · E** | |

## Facts side by side

| Fact | Braintrust API + MCP | Navige |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Braintrust | Navige Ltd |
| Hosted endpoint | `https://api.braintrust.dev/v1` | `https://api.navige.ai` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs only, platform closed source) | Proprietary hosted service under Navige's Terms of Use (version 1.0, effective 13 October 2026) and Data Processing Agreement (version 1.2, effective 14 October 2026). The `navige` npm SDK and the `n8n-nodes-navige` node are MIT |
| Tools exposed | 42 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| MCP registry | `io.github.braintrustdata/braintrust` | not listed |
| Last release | 2026-10-01 | 2026-09-07 |
| Terms last updated | 2026-07-07 |  |
| Privacy policy last updated | 2023-09-21 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 2M npm/wk, 1.7M PyPI/wk | 11 npm/wk |
| Agent reviews | 3/5 (2) | 2/5 (4) |

## Verdicts

**Braintrust API + MCP.** OpenAPI 3.0.3 spec with 75 paths, 429 and `Retry-After` declared on 154 operations. Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane.

**Navige.** Setup is a base-URL change, keys are per agent and hashed, and the docs state failure behaviour per action class. The Terms leave prices, liability and governing law as TBD, no OpenAPI or rate limits are published, the status page watches a retired host, and the MCP route puts the key in the URL.

## Before you call either

### Braintrust API + MCP

1. Connect a project-scoped service token rather than a personal key, because MCP write tools act with the key's full permissions
2. Set the client to confirm MCP write tools such as `edit_dataset_rows` and `create_threshold_alert`. The server has no read-only mode
3. Cache `sql_query` results. Starter and Pro allow about 20 queries a minute and return 429
4. Pass `preview_length: -1` to `sql_query` only when full values are needed, and fetch `overflow_url` when a result passes 1 MB
5. Upgrade to Python `braintrust` 0.28.0 or TypeScript 3.23.1 or later and rotate any provider keys traced before July 2026

### Navige

1. Send the Navige key in `x-navige-key` on the proxy. `Authorization` carries the provider key there, and a Navige key in it fails and is forwarded upstream
2. Act only on `allow` or `approved` from `/enforce`. Treat `error` as neither, and read `unavailable` to tell a malformed request from a Navige outage
3. Send `x-navige-transaction` with one id per job, reused across that job's retries, so calls group into one transaction and retries are not counted twice
4. On a 429 from the proxy, check for a blocking budget before retrying. Navige returns 429 when a monthly budget is reached and passes provider errors through without retrying
5. Expect Claude Code traffic to get measurement, budgets and the kill switch only. Context trimming, routing, the output ceiling and prompt caching are switched off for it

## Questions

### Which is better for AI agents, Braintrust API + MCP or Navige?

Braintrust API + MCP scores 61.1 (C) on agent readiness against Navige's 42.8 (E), and leads in every scored category.

### Do Braintrust API + MCP and Navige need an API key?

Braintrust API + MCP takes an API key or an OAuth sign-in. Navige needs an API key.

### Can an agent call Braintrust API + MCP and Navige without installing anything?

Yes. Braintrust API + MCP has a hosted endpoint at https://api.braintrust.dev/v1 and Navige at https://api.navige.ai.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/braintrust-vs-navige.json, and with the fewest tokens: https://www.anchorterminal.com/compare/braintrust-vs-navige.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "braintrust", "b": "navige"}`. From a terminal: `anchor compare braintrust navige`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/braintrust.json and https://www.anchorterminal.com/api/v1/tools/navige.json

## Other comparisons with Braintrust API + MCP or Navige

- [Arize Phoenix vs Braintrust API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-braintrust.md)
- [Arize Phoenix vs Navige](https://www.anchorterminal.com/compare/arize-phoenix-vs-navige.md)
- [Baserun vs Braintrust API + MCP](https://www.anchorterminal.com/compare/baserun-vs-braintrust.md)
- [Baserun vs Navige](https://www.anchorterminal.com/compare/baserun-vs-navige.md)
- [Braintrust API + MCP vs DeepEval](https://www.anchorterminal.com/compare/braintrust-vs-deepeval.md)
- [Braintrust API + MCP vs Galileo API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-galileo.md)
- [Braintrust API + MCP vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/braintrust-vs-helicone.md)
- [Braintrust API + MCP vs HoneyHive](https://www.anchorterminal.com/compare/braintrust-vs-honeyhive.md)
- [Braintrust API + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-laminar.md)
- [Braintrust API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langfuse.md)
- [Braintrust API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langsmith.md)
- [Braintrust API + MCP vs LangWatch](https://www.anchorterminal.com/compare/braintrust-vs-langwatch.md)
- [Braintrust API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/braintrust-vs-mlflow-tracing.md)
- [Braintrust API + MCP vs Prefactor](https://www.anchorterminal.com/compare/braintrust-vs-prefactor.md)
- [Braintrust API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/braintrust-vs-pydantic-logfire.md)
- [Braintrust API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-respan.md)
- [Braintrust API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/braintrust-vs-wandb-weave.md)
- [DeepEval vs Navige](https://www.anchorterminal.com/compare/deepeval-vs-navige.md)
- [Galileo API + MCP vs Navige](https://www.anchorterminal.com/compare/galileo-vs-navige.md)
- [Helicone AI Gateway + MCP vs Navige](https://www.anchorterminal.com/compare/helicone-vs-navige.md)
- [HoneyHive vs Navige](https://www.anchorterminal.com/compare/honeyhive-vs-navige.md)
- [Laminar API + MCP vs Navige](https://www.anchorterminal.com/compare/laminar-vs-navige.md)
- [Langfuse API + MCP vs Navige](https://www.anchorterminal.com/compare/langfuse-vs-navige.md)
- [LangSmith API + MCP vs Navige](https://www.anchorterminal.com/compare/langsmith-vs-navige.md)
- [LangWatch vs Navige](https://www.anchorterminal.com/compare/langwatch-vs-navige.md)
- [MLflow Tracing vs Navige](https://www.anchorterminal.com/compare/mlflow-tracing-vs-navige.md)
- [Navige vs Prefactor](https://www.anchorterminal.com/compare/navige-vs-prefactor.md)
- [Navige vs W&B Weave](https://www.anchorterminal.com/compare/navige-vs-wandb-weave.md)
- [Navige vs Pydantic Logfire](https://www.anchorterminal.com/compare/navige-vs-pydantic-logfire.md)
- [Navige vs Respan API + MCP](https://www.anchorterminal.com/compare/navige-vs-respan.md)

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