Oráculo B2R — Brazilian Tax Intelligence for AI Agents
https://oraculo-b2r.rendercriativo.workers.dev/mcp ↗
Description
Brazilian tax intelligence MCP server for AI agents. Calculates Fator R, Simples Nacional tax brackets, DAS estimates, and provides strategic tax planning for Brazilian businesses (MEI, ME, EPP).
What our measurements say
Oráculo B2R — Brazilian Tax Intelligence for AI Agents is a remote MCP server published at oraculo-b2r.rendercriativo.workers.dev. 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 407 ms, placing it among the faster endpoints. It offers a narrow, focused set of 4 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 are descriptive and indicate specific functions
- Descriptions provide clear usage scenarios for each tool
- Built-in validations and risk alerts are mentioned
Weaknesses
- Some tool names are generic (e.g., 'fetch_oracle_data')
- No explicit error handling or constraint documentation in descriptions
fetch_oracle_data— Name is generic and could be more specific about data type
Verdict
Event narrative
Risk: medium
- 2026-09-10T21:16:35.016Z — era changed from 'auth-gated' to 'legacy', complianceScore rose from null to 100 · indicates successful transition to legacy mode with full compliance
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 174ms → warm 159ms (penalty 15ms)
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Server build: — → 0.2.0
- Supported versions: — → 2025-11-25
- Era changed: Auth-gated → Legacy
- Added to watch — era: Auth-gated
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