PlanetGraph
https://api.planetgraph.ai/mcp/ ↗
Description
The AI-Native Graph Database That Turns Your Data into Actionable Intelligence
What our measurements say
PlanetGraph is a remote MCP server published at api.planetgraph.ai. It has been probed 6 times since 9/10/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 377 ms, placing it among the faster endpoints. It exposes a broad tool surface of 16 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names use consistent prefixes and verbs (e.g., 'list', 'get') for predictable functionality
- Descriptions include optional parameters and use cases for most tools
- Distinct tools for querying vs. validating vs. running operations
Weaknesses
- Some descriptions lack specific use scenarios (e.g., 'planetgraph_me')
- No explicit error handling or constraint documentation
- Parameter schemas not specified in descriptions
planetgraph_properties_search— Truncated example text cuts off important usage contextplanetgraph_schema_describe— Incomplete description with vague 'use filters' instructionplanetgraph_datasets_list— Lacks clarification on what 'DataSet declarations' specifically includeplanetgraph_query_capabilities— Doesn't explain when/why this differs from standard Neo4j behavior
Verdict
Event narrative
Risk: medium
- 2026-09-10T21:16:35.016Z — Era changed from 'auth-gated' to 'legacy' · Indicates system migration to a legacy operational framework
- 2026-09-11T07:35:54.413Z — Compliance score improved from null to 100 · Suggests successful validation of operational standards in legacy era
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 167ms → warm 161ms (penalty 6ms)
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Server build: — → 1.30.0
- Supported versions: — → 2025-11-25
- Era changed: Auth-gated → Legacy
- Added to watch — era: Auth-gated
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