Keystone Opportunity API

x402 resource x402 REST

keystone-opportunity-api.keystone-opportunity.workers.dev · keystone-opportunity-api.keystone-opportunity.workers.dev · Productivity & Docs

Provider site ↗

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.

Price per call 0.002 USDC per call published unit: per call

Calls · 30d 3 counted by the source, no daily split

Payers · 30d 3 distinct paying addresses seen by the source

Observed inflows · 30d $0.135 72 transfers to the payout address

Inflow growth · 7d — not comparable (baseline under $1 or window incomplete)

Payment evidence Observed transfers confidence: medium · read 2026-11-01

Observed inflows · last 30 days

$0.02USD observed / day

2026-10-02grey = not scanned · UTC days2026-10-31

Observed inflows by window for Keystone Opportunity API.
Window	Observed	Transfers
Last complete day (2026-10-31)	$0.006	3
Last 7 days	$0.064	33
Last 30 days	$0.135	72
Growth, 7d against the 7 before	not comparable

Source: on-chain transfer scan (USDC on Base) Window: 2026-10-02 → 2026-10-31 Scanned: 30/30 days Sample: 30 days with a measurement First seen: 2026-10-02 Last update: 2026-10-31

Daily history →. Observed transfers show value arriving at the payout address; they do not establish service revenue.

Blockchain wallets

Full addresses · public payment evidence

Receiving wallets are payment addresses published for this service. Sending wallets transferred funds to an exclusive receiving address; this alone does not prove a purchase or identify an agent.

Receiving wallets · provider payment addresses

All published receiving wallet addresses for Keystone Opportunity API.
Network	Full wallet address	Evidence
Base	0xd3fad775704a0ed209315a406c3d99ed589ee723	Exclusive to this catalogue serviceFrom source record · source: x402_bazaar

Sending wallets · observed counterparties

All 4 retained sending addresses are listed below. Source: on-chain transfer scans. Dates are UTC days.

All retained sending wallet addresses observed for Keystone Opportunity API.
Network	Full wallet address	Transfers	First / last observed	Last scanned (UTC)
Base	0x47e5499c44ecf8c78da82b9b64183df1e301a0b4	14	2026-10-28 / 2026-11-01	2026-11-01 11:43:00
Base	0x6f890cc63aa57da9695528c9f5e3434897b32b8e	8	2026-10-28 / 2026-11-01	2026-11-01 11:43:00
Base	0xa1d1c0cf717402ff3651aa4873ccf96410b01978	1	2026-10-29 / 2026-10-29	2026-10-30 23:38:16
Base	0xf1f15ab1b66377d6d60b8938a737122551be57f9	1	2026-10-29 / 2026-10-29	2026-10-30 23:38:16

Coverage includes retained scans only, not every historical transaction. Earlier daily totals cannot recover sender addresses. Sender lists exclude shared receiving wallets, whose transfers could belong to another service. A provider address does not establish wallet ownership.

Competitors & category benchmark

Rank the whole category →

Closest competitors Productivity & Docs

:workflowName 5,625 calls · 0.01 USDC per call —
Profile view 923 calls · 0.01 USDC per call —
Person dossier 374 calls · 0.001 USDC per call —
Makers 165 calls · 0.02 USDC per call —
Summary 82 calls · 0.02 USDC per call —

Sorted by source-measured calls, not by our opinion. The right-hand figure is observed inflow, which stays empty for peers whose address is shared.

Category benchmark 8,903 services in this category

With a measured call count	6,838 (76.8 %)
With a published price	6,956 (78.1 %)
With attributable inflows	32 (0.4 %)
Observed inflows · 30d	$36,566.28
Median measured calls	2
Median price per call	$0.01

Similar services

All of Productivity & Docs →

:workflowName x402 REST usage

Chainlink For Agents: execute a catalog workflow by workflow name.

agents.chain.link Productivity & Docs 5,625 calls / 30d checked 2026-11-01

0.01 USDC per call per call

Profile view x402 REST usage

View a LinkedIn profile through a human-connected account that granted `view_profile`, returning a public-safe summary (name, headline, location, network distance). `notify: true` shows the human as having viewed the pro...

win.oneshotagent.com Productivity & Docs 923 calls / 30d checked 2026-10-28

0.01 USDC per call per call checked

Person dossier x402 REST usage

Person dossier — profile, social accounts, articles, posts and written summary. Phone lookup is off by default. include_phone=true adds the per-person add-on on the pricing page for up to one person; no phone hit is guar...

win.oneshotagent.com Productivity & Docs 374 calls / 30d checked 2026-11-01

0.001 USDC per call per call

Makers x402 REST usage

Deepstate, the on-chain order-book exchange on Robinhood Chain. Per-maker time-at-top, notional rested, fills, and maker rewards earned for a market (token varies by market; see /deepstate/v1/markets).

api.onesource.io Productivity & Docs 165 calls / 30d checked 2026-11-01

0.02 USDC per call per call

Chosen by category and by whether we have measured them, not by who pays us. A sponsored placement in this list is labelled as such.

Service details, payment routes and source evidence

Where you can pay

1 route from the provider's payment requirements

Payment networks and amounts published for Keystone Opportunity API.
Network	Scheme	Amount	Asset
Base	exact	0.002	USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 2000 = 0.002 USDC per call on Base.

What you can call

access: payment per call (x402)

endpoint https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities

Request

{
    "method": "GET",
    "queryParams": {
        "capital": "1",
        "hours": "4",
        "limit": "10",
        "skills": "typescript,research"
    },
    "type": "http"
}

Response

{
    "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
        }
    },
    "type": "json"
}

Examples are the provider's own, not a call we made.

Opportunity insights

2 findings from measured data

Call count and inflow disagree

The observed inflow implies about 68 calls at list price; the source counted 3 (factor 23). Either the effective price differs from the list price, or part of the volume belongs to other payers on the same address. Do not read the inflow as this service's revenue.
Peers with attributed inflows →
Category benchmark

32 of 8,903 services (0.4%) in Productivity & Docs have attributable inflows; 6,838 have a source-measured call count. Median measured calls: 2.
Rank this category by observed inflows →

What the provider says

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.

Quoted from x402 Bazaar · source record · read 2026-11-01

Facts and where they come from

Price: 0.002 USDC per call Provider claim
Recorded value: 0.002 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities
Source: x402 Bazaar (Coinbase CDP) · Public discovery API (provider-published records)
Last checked: Not checked by us yet — the data is as the source published it
First seen: 2026-10-24
Usage: 3 calls · 3 unique payers in the 30 days before 2026-10-24. Measured by the x402 Bazaar, not by us and not by the provider.

Money, and what it actually proves

Verified revenue · 30d Unknown

Observed inflows · 30d $0.135

Attribution Exclusive

Receipt ledger Not connected

Observed transfers · confidence medium
Token transfers reached this service's own payout address. A transfer is not a purchase, and shared, refunded or unrelated transfers cannot be excluded.

Why revenue is “unknown”. A revenue figure needs a receipt: an amount a buyer actually paid for this service. We hold none for this entry, and we hold no funds at all. What we have instead is $0.135 arriving at the payout address in 30 days — that is volume, and a lower bound: transfers can be refunds, treasury moves, or payments for something else entirely.

Cross-check. At the published price the observed inflow would cover about 68 calls; the source counted 3. Two independent measurements of the same question — they never match exactly, because the effective price differs per call size and the address can also receive unrelated transfers.

Daily market statistics — the ledger view, day by day

No daily history has been archived for this service yet. Open the full daily history →

Payment rails

Base · exact · USDC

0xD3faD775704a0Ed209315A406c3D99ED589ee723

0.002 USDC

From source record

A payment rail is where the provider asks to be paid. It is not proof that anything was paid through it.

Provenance

One row per statement. “Verified” means we checked it ourselves and the finding is quoted. “Provider claim” means we read it in the provider's own record. “Not found” is a statement about our search, not proof of absence.

Statement	Status	What we found	Source	Checked
Endpoint	Provider claim	https://keystone-opportunity-api.keystone-opportunity.workers.dev/v1/opportunities Evidence Als Resource-URL im Bazaar-Eintrag geführt.	api.cdp.coinbase.com	2026-11-01
Input output	Provider claim	Request/response examples published with the listing Evidence Beispiel-Ein- und -Ausgabe stammen aus dem Bazaar-Eintrag des Anbieters.	api.cdp.coinbase.com	2026-11-01
Payment	Provider claim	1 rail: Base · payee 0xD3faD775704a0Ed209315A406c3D99ED589ee723 Evidence Aus den `accepts`-Einträgen: Netzwerk, Asset, Empfängeradresse und Betrag. Die Adresse ist die Grundlage der späteren On-Chain-Zuordnung; sie ist noch nicht durch eine eigene 402-Antwort bestätigt.	api.cdp.coinbase.com	2026-11-01
Pricing	Provider claim	0.002 USDC per call Evidence Atomic amount 2000 = 0.002 USDC per call on Base. Netzwerk: Base.	api.cdp.coinbase.com	2026-11-01
Protocol	Provider claim	x402 (HTTP 402 payment challenge) Evidence Im x402 Bazaar als zahlungspflichtige HTTP-Ressource gelistet (x402Version 2, Typ http).	api.cdp.coinbase.com	2026-11-01
Provider	Provider claim	keystone-opportunity-api.keystone-opportunity.workers.dev Evidence Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.	api.cdp.coinbase.com	2026-11-01
Usage	Verified	3 calls / 3 unique payers in the last 30 days Evidence Source-reported usage from Coinbase x402 Bazaar, read on 2026-11-01. Letzter Aufruf laut Quelle: 2026-10-17T08:33:55.543Z. Aufrufe sind kein Umsatz.	api.cdp.coinbase.com	2026-11-01

Endpoint checks

We have not called this endpoint yet. Until we do, everything above is what the source published — no more.

Price

0.002 USDC per call

price checked 2026-11-01 Open at keystone-opportunity-api.keystone-opportunity.workers.dev

You buy from the provider, not from us. This page takes no payment, holds no funds and stores no wallet keys.

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