Compass by 402rates
https://api.402rates.com/mcp/compass ↗
Description
Free agent tests (no account or payment); paid ping.
What our measurements say
Compass by 402rates is a remote MCP server published at api.402rates.com. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 169 ms, placing it among the faster endpoints. It offers a narrow, focused set of 11 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
- Some tools have detailed parameter definitions with clear types and optional flags.
- Descriptions explicitly mention 'no real payment' and 'synthetic' operations, avoiding confusion about actual costs.
Weaknesses
- Tool names are generic (e.g., 'list_agent_test_cases') and do not clearly indicate their specific use cases.
- Descriptions often focus on what the tool does rather than when/why to use it (e.g., 'execute_test_action' lacks context for action_type usage).
- Multiple tools (e.g., 'inspect_test_state' vs. 'read_agent_test_report') have overlapping purposes, creating ambiguity.
- Parameters are inconsistently documented (e.g., 'access_token' appears in multiple tools without explaining its role).
list_agent_test_cases— Name does not clarify if it lists test cases for agents or synthetic scenarios.describe_agent_test— Description lacks explicit use cases (e.g., 'when to select a variant').start_agent_test— Parameters like 'configuration_changed' are ambiguous without context on what constitutes a change.check_payment_terms— Mentions 'exact EVM profile checks' but does not clarify error handling for non-EVM profiles.
Verdict
Event narrative
Sign up free to generateSchema 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 48ms → warm 42ms (penalty 6ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
list_agent_test_casesFree catalogue of versioned synthetic cases: unavailable confirmation, retry credits and attempt limits, and partial results with continuation. No run, wallet or payment.
describe_agent_testFree description of a versioned synthetic task, its limits and coverage. Optional case selection; omitted selection describes the original confirmation case. No run, payment or wallet.
case_idstringcase_versionstringvariantstring
start_agent_testCreate a free bounded synthetic run without an account. An optional finalized previous run and its token link a repeat of the same case version and scenario. No real purchase. Caller model costs remain external.
case_idstringcase_versionstringvariantstringprevious_run_idstringconfiguration_changedbooleanaccess_tokenstring
execute_test_actionExecute the selected case's action: synthetic order, retry attempt, page retrieval or result submission. Identical keys and input replay the stored outcome. Calls, effects and simulated credits remain observable. No real payment.
run_idstringtask_idstringaction_keystringquantityintegeraction_typestringcursorstringrecord_idsarrayaccess_tokenstring
inspect_test_stateRead operation records for a synthetic task. Observation timestamps and state describe the test service only. No claim about client receipt or overall agent reliability.
run_idstringtask_idstringaccess_tokenstring
read_agent_test_reportRead calls, timestamps, operations and resulting state. Optional finalization freezes the run. A linked repeat includes the previous frozen report while retained. No score, certification or judgment of the agent.
run_idstringfinalizebooleanaccess_tokenstring
check_payment_termsFree inspection of supplied x402 v1/v2 payment terms against the SDK schema and optional network, asset, recipient and atomic budget constraints. Exact EVM profile checks only. No wallet connection, external fetch, signature verification or settlement. Other profiles are explicitly untested.
challengeobjectexpectedobject
list_capabilitiesFree capability and MCP tool catalogue for Compass by 402rates. Contains this product and shared service information only.
find_x402_resourceSearches the x402 resource catalogue and returns matching paid endpoints with their price, the chains they accept, and their 30-day usage from the catalogue's own counters: total calls, distinct paying addresses, the ratio between the two, and days since the last payment. Every figure is a count and carries its definition; no entry is scored, rated or labelled. Answers from a dated weekly snapshot and states which day it is from. Free.
qstringmax_pricenumbernetworkstringlimitinteger
get_manifestFree OpenAPI manifest for Compass by 402rates. Contains this product and shared service information only.
base_urlstring
test_paymentPayment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options can include Base, Polygon, Arbitrum and XDC; the challenge lists currently available networks for each transport. The receipt identifies the paid network and transaction. Business/professional use only. Terms: https://402rates.com/data-terms/ Price: 0.001 USDC per call over x402.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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[](https://mcpmetrics.io/servers/com-402rates-compass)<a href="https://mcpmetrics.io/servers/com-402rates-compass"><img src="https://mcpmetrics.io/badge/com.402rates/compass/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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