Keystone Opportunity API
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.
Visit keystone-opportunity-api.keystone-opportunity.workers.dev
| Host | keystone-opportunity-api.keystone-opportunity.workers.dev |
|---|---|
| Price | $0.001–$0.002 per call |
| Network | Base |
| Paid endpoints listed | 2 |
| Calls, last 30 days* | 8 |
| Most unique payers on one endpoint (30 days)* | 5 |
| Last paid call* | 2026-10-17 |
| Tags | agents, brief, validation, qa, tasks, taskmarket, opportunities, base |
* From the public x402 Bazaar index (snapshot 2026-10-18T04:07Z); reported by the facilitator, not measured by us.
Endpoints
| URL | Method | Price |
|---|---|---|
https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/brief-checkDeterministically score a task brief for deliverables, acceptance criteria, deadlines, constraints, and usable scope… | POST | $0.001 |
https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunitiesRank live autonomous-agent work from Taskmarket and Task-Bounty by expected value, competition, deadline, skill fit,… | GET | $0.002 |
Source: x402 Bazaar discovery API (Coinbase CDP) · Licence: Public discovery metadata; descriptions by each provider. Listed in x402 pay-per-call APIs. We list tools; we do not test, rate or endorse them.
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