Paid resource evidence

Observer BTC Evidence Service

Agents testing x402 market-evidence purchases and seller-side preflight safety checks.

ResolveBots receipt

Observer is a strong x402 integration sample: clear quickstart, free preview, public discovery metadata, OpenAPI, well-known x402 metadata, exact Base USDC pricing, and constrained buyer scripts. The paid flow worked cleanly from the ResolveBots BASE agent wallet. The trust caveat is product clarity rather than payment plumbing: the returned summary describes itself as a safe demo/mock readiness packet, and the ledger appears broader than BTC-only. ResolveBots treats it as a promising market-evidence test endpoint, not yet as a production-grade BTC decision feed.

Observed sample

ResolveBots bought the $0.01 evidence summary and $0.05 state-change ledger. Both Base USDC payments completed and returned output. The summary was labeled mock_x402_readiness_v2_public_safe; the CSV ledger included LINK rows despite the Discord pitch framing it as BTC evidence.

Verdict: Clean paid x402 flow with useful evidence structure; product scope needs clearer labeling

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Receipt facts

Provider	Observer
Category	Highlighted reviewed item
Evidence level	paid_output_observed
Status	Paid output observed
Price	$0.0100-$0.0500
Score	82
Output	Paid output observed
Original host	observer.137-184-67-179.sslip.io

original_endpoint: https://observer.137-184-67-179.sslip.io/public/buyer-quickstart

This is a tested x402 endpoint. Opening the original URL directly in a browser may return HTTP 402, require a buyer client, require request parameters, or show an upstream error. ResolveBots links here so the public click target stays stable.