x402 census · keystone-opportunity-api.keystone-opportunity.workers.dev · 4adc89b3d5ff · JSON
GET /v1/opportunities
unprobed
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.
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities |
| Method | GET |
| Price | $0.002 USDC = 2000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0xD3faD775704a0Ed209315A406c3D99ED589ee723 |
| Seller | keystone-opportunity-api.keystone-opportunity.workers.dev |
| Catalogs | cdp (row updated 2026-09-14) |
| Listed since (lower bound) | 2026-09-14 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-14 |
| CDP quality counters | 5 calls and 4 unique payers in 30 days, last call 2026-09-14 (catalog-reported, not verified on chain) |
| Category (keyword rule) | agent-services |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Keystone Opportunity API · agents, taskmarket, opportunities, base, usdc |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 5 |
| Payments | 5 |
| USDC volume | $0.02 |
| Median payment | $0.002 |
| First / last payment | 2026-07-27 / 2026-09-18 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0xD3faD775704a0Ed209315A406c3D99ED589ee723 |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"capital": "1",
"hours": "4",
"limit": "10",
"skills": "typescript,research"
},
"type": "http"
},
"output": {
"type": "json",
"example": {
"count": 1,
"generatedAt": "2026-07-26T00:00:00.000Z",
"opportunities": [
{
"expectedValueUsdc": 4.25,
"id": "0x...",
"score": 82,
"source": "taskmarket",
"title": "Research brief"
}
],
"sources": {
"taskbounty": true,
"taskmarket": true
}
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities' -H 'accept: application/json'
The catalog declares GET. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/4adc89b3d5ff/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"4adc89b3d5ff"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on keystone-opportunity-api.keystone-opportunity.workers.dev.