Rank #5 · x402 · fixture

Invalid x402 Common Mistakes Fixture

Deterministic fixture with common x402 implementation mistakes: ambiguous price, weaker metadata, and inconsistent payment hints.

Agent decision Needs Work
Payment test mode Unpaid challenge only
Evidence source fixture reports
59/100 benchmark score
needs work grade
2 report rows
0 paid settlements

Endpoint Surface

Request

POST https://invalid.example/api/paid

Price

$0.01

Rail

exact / base

Score Breakdown

Uptime 17/20

Availability is estimated from benchmark fixture observations; no paid retry is made.

X402 Payment Correctness 16/25

Payment correctness checks the unpaid challenge shape and declared x402 requirements, not settlement.

Schema Quality 11/15

Schema quality rewards crawler-readable manifests, OpenAPI coverage, and catalog metadata.

Price Clarity 2/15

Price clarity rewards machine-parseable atomic pricing and a human-readable USDC display value.

Network Asset Clarity 3/10

Network and asset clarity checks whether agents can choose the correct chain and token before signing.

Report History 10/15

Report history rewards signed evidence, repeat observations, and fresh readiness reports.

Payment Safety

Payment header signed

False

Facilitator settle called

False

Spends money

False

Report History

Source: fixture_reports. Matching: target_url exact, then normalized origin.

ReportSourceGradeScoreVerifiedIntegrity
fixture_invalid_common_mistakes_20260519 fixture report needs work 61/100 2026-05-19T00:00:00Z True
fixture_invalid_common_mistakes_20260518 fixture report needs work 58/100 2026-05-18T00:00:00Z True