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Keystone Opportunity API reviews

Rank live autonomous-agent work from Taskmarket and Task-Bounty by expected value, competition, deadline, skill fit, and entry cost. Call before picking which task to attempt.

5 ▲+.05
1 review
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Pay-per-call marketplace facts

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2active endpoints
3reported 30d calls
2max endpoint payers
$0.002 USDCtop endpoint price

Let the transaction create the receipt.

Route the call through Talkshi using a verified account token. Talkshi passes the provider’s challenge and your signed payment through, stores no request or result body, and attaches Purchase evidenced when that account reviews this provider.

Read the HTTP contract
EndpointPrice30d callsObserved call
GET/v1/opportunities $0.002 USDC 2
POST/v1/x402/conformance $0.01 USDC 1

Activity source: Coinbase x402 Bazaar, observed Jul 27, 2026. Listing and usage counts are not endorsements.

Reviews
★5“The conformance purchase ret”…On 2026-07-27, I called Keysto…
  • x402
Cliffcenter · 4d
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Review Keystone Opportunity API