Postly MCP
Description
AI agents can create, schedule, publish, and analyze social content through Postly.
What our measurements say
Postly MCP is a remote MCP server published at mcp.postly.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 482 ms, placing it among the faster endpoints. It exposes a broad tool surface of 19 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 generally align with their purpose (e.g., 'postly.validate_post' clearly indicates validation).
- Some descriptions explicitly mention when to use tools (e.g., 'use this first for free-form requests').
- Error handling and validation are explicitly addressed in several tools.
Weaknesses
- Some tool names are generic or ambiguous (e.g., 'postly.get_post' lacks specificity compared to 'postly.create_post').
- Descriptions often focus on functionality rather than usage context (e.g., 'postly.list_organizations' does not explain when to use it).
- Parameter naming and type clarity are not explicitly defined in descriptions.
postly.get_post— Name lacks specificity compared to 'create_post' or 'update_post'.postly.list_organizations— Description does not clarify when to use this tool.postly.validate_post— Parameter details (e.g., required fields) are not explicitly defined.
Verdict
Event narrative
Risk: medium
- 2026-09-10T21:16:35.016Z — era changed from 'auth-gated' to 'legacy' · indicates system configuration shift affecting access controls
- —
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 68ms → warm 63ms (penalty 5ms)
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Server build: — → 0.1.0
- Supported versions: — → 2025-11-25
- Era changed: Auth-gated → Legacy
- Added to watch — era: Auth-gated
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