PHION Agent Trust Infrastructure
Description
Fifteen AI-agent trust, commerce and RWA services with x402 USDC on Base, Polygon and Arbitrum.
What our measurements say
PHION Agent Trust Infrastructure is a remote MCP server published at phion.systems. 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 566 ms, a delay an agent will notice. 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
Agent readability score
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| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-13 01:33:33 | Legacy | 200 | 563 | 200 | 579 | 2025-06-18 |
| 2026-09-12 23:31:36 | Legacy | 200 | 532 | 200 | 525 | 2025-06-18 |
| 2026-09-12 21:29:15 | Legacy | 200 | 630 | 200 | 634 | 2025-06-18 |
| 2026-09-12 19:27:29 | Legacy | 200 | 1752 | 200 | 1743 | 2025-06-18 |
| 2026-09-12 17:24:09 | Legacy | 200 | 563 | 200 | 566 | 2025-06-18 |
| 2026-09-12 15:21:42 | Legacy | 200 | 484 | 200 | 479 | 2025-06-18 |
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 157ms → warm 155ms (penalty 2ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
preflightFree URL safety and reachability check.
urlstringrequired
try_serviceFree representative preview, exact price and upgrade instructions for any PHION paid service; no wallet required.
servicestringrequired
schema_normalize_freeFree, rate-limited payload validation and safe key normalization before payment. Payment-critical values are never changed.
payloadobjectrequiredtarget_servicestringrequired
verifyFree verification of a PHION signed receipt.
contentreceiptobjectrequiredsourcesarray
attestx402 paid signed JSON attestation; 0.001 USDC on Base.
contentrequiredsourcesarrayttl_secondsinteger
payment_preflightx402 paid deterministic payment firewall; 0.002 USDC on Base.
intent_idstringpayment_requirementobjectrequiredpolicyobjectrequired
fetch_evidencex402 paid independent web evidence; 0.004 USDC on Base.
urlstringrequired
mandate_reservex402 paid atomic spending-mandate reservation; 0.004 USDC on Base.
amountstringrequiredcapability_tokenstringrequiredcumulative_limitstringrequiredidempotency_keystringrequiredmandate_idstringrequiredttl_secondsinteger
inspect_agentx402 paid AI-agent due diligence; 0.009 USDC on Base.
urlstringrequired
journey_verifyx402 paid verification of a commerce journey; 0.010 USDC on Base.
eventsarrayrequiredexpectedobjectrequiredjourney_idstringrequired
transaction_assurancex402 paid end-to-end transaction assurance; 0.015 USDC on Base. Separately verifies settlement, delivery and deterministic acceptance.
acceptancearraydeliveryobjectrequiredintentobjectrequiredofferobjectrequiredpaymentobjectrequiredtransaction_idstringrequired
transaction_recoveryx402 paid transaction failure classification and signed recovery claim; 0.010 USDC on Base.
assuranceobjectrequiredattemptsarraypaymentobjectrequiredpolicyobjectrequiredtransaction_idstringrequired
Availability history
Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Era history
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
Response time history
The two probe legs separately: modern server/discover and legacy initialize.
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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