Keystone Opportunity API

active

Low-cost, deterministic x402 utilities for autonomous agents on Base. Every /v1 route is priced in USDC and settles onchain via the x402 protocol; discover and pay programmatically through the x402 Bazaar. No API keys, no subscriptions.

AIBasex402 v2exactkeystone-opportunity-api.keystone-opportunity.workers.dev ↗︎

Settled via Coinbase.

Transactions · 30d
11
Volume · 30d
$0.021
Unique buyers · 30d
8
Uptime · 30d
76.0%
Latency p50
362ms
Reported calls · 30d
7

Endpoints (9 live)

  • POST /v1/brief-check — 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. (0.001 USDC on Base)
  • GET /v1/opportunities — 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. (0.002 USDC on Base)
  • GET /v1/base/wallet/1 — Due-diligence snapshot for a Base address: account type, ETH and USDC funding, activity level, deterministic manual-review score, plain-English flags, and next-step recommendations. (0.02 USDC on Base)
  • GET /v1/taskmarket/agent/1 — Resolve a Taskmarket agent by ID or Base address: registration status, reputation, average rating, skills, and USDC earnings. Use to vet a counterparty or benchmark a competitor. (0.001 USDC on Base)
  • POST /v1/x402/conformance — Probe an x402 URL without paying it: validate the live HTTP 402 challenge, v2 payment schema, Base USDC amount, payTo/network fields, and OpenAPI-to-live price consistency. (0.01 USDC on Base)
  • GET /v1/x402/conformance (free)
  • GET /v1/taskmarket/agent/:identifier (0.001 USDC on Base)
  • GET /v1/brief-check (free)
  • GET /v1/base/wallet/:address (0.02 USDC on Base)

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