Keystone Opportunity API

keystone-opportunity-api.keystone-opportunity.workers.dev · x402

Deterministically score a task brief for deliverables, acceptance criteria, deadlines, constraints, and usable scope before committing time. No AI calls; same brief always yields the same score.

Name and description as published by x402 Bazaar

Live

Last successful check: 25 Oct 2026, 23:43 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

6 different wallets paid it in the last 30 days, as the x402 Bazaar reports. Payments

How addrbook checks →

Connect

https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/brief-check

x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.

Who's behind it

Listed by: x402 Bazaarlast seen 26 Oct, 05:59 UTC
Wallets named: 0xd3fad775704a0ed209315a406c3d99ed589ee723named by x402 Bazaar
Listed since: 25 Oct 2026, 17:51 UTC

Payments

different wallets paid it, last 30 days: 6
paid calls, last 30 days: 6
last paid call (UTC): 23 Oct, 23:24

As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read 26 Oct 2026, 05:59 UTC. addrbook has not counted these payments itself.

Its x402 endpoints have not listed a payment option addrbook could read yet.

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
keystone-opportunity-api.keystone-opportunity.workers.dev	x402	Live	25 Oct, 23:43	25 Oct, 23:43	100%	100%	—

Also listed as

Other entries that share an endpoint with this one.

keystone-opportunity-api.keystone-opportunity.workers.dev