MARKET MONITOR / CATALOGUE Services 133,908 MCP listed 40,872 x402 93,117 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-31 · 3 sources
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Daily transfers, volume and coverage →

Masters

x402 resource x402 REST

chess402.vercel.app · chess402.vercel.app · Databases & Storage

Masters opening explorer for a position. Returns top moves, win/draw/loss rates, and recent top master games from the Lichess masters database.

Price per call 0.003 USDC per call published unit: per call
Calls · 30d 4 counted by the source, no daily split
Payers · 30d 4 distinct paying addresses seen by the source
Observed inflows · 30d — not attributable
Inflow growth · 7d — not comparable (baseline under $1 or window incomplete)
Payment evidence Attribution blocked confidence: low · read 2026-10-31

Observed inflows · last 30 days

No inflow observed in this window

The payout address is also published by 3 other service(s); the volume cannot be attributed to one of them.

Observed inflows by window for Masters.
Window Observed Transfers
Last complete day (2026-10-30) — —
Last 7 days — —
Last 30 days — —
Growth, 7d against the 7 before not comparable
Source: on-chain transfer scan (USDC on Base) Window: 2026-10-01 → 2026-10-30 Scanned: 30/30 days Sample: 0 days with a measurement First seen: never Last update: 2026-10-30

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 Masters.
NetworkFull wallet addressEvidence
Base 0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f Shared address · activity cannot be assigned to this serviceFrom source record · source: x402_bazaar

Sending wallets · observed counterparties

No sending wallet addresses have been retained for this service. Buyer wallets are unknown; daily totals and reported payer counts do not reveal their addresses.

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 Databases & Storage
  • Encrypted 1,263 calls · 0.03 USDC per call —
  • Id 603 calls · 0.0025 USDC per call —
  • Allium 74 calls · 0.01 USDC per call —
  • Query 29 calls · 0.005 USDC per call —
  • Card Hedge 25 calls · 0.01 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 2,078 services in this category
With a measured call count 306 (14.7 %)
With a published price 357 (17.2 %)
With attributable inflows 11 (0.5 %)
Observed inflows · 30d $5.01
Median measured calls 2
Median price per call $0.01

Encrypted x402 REST usage

Send an HPKE-sealed literature query to Aubrai and receive an encrypted result. The transport terminates at Aubrai; literature retrieval and evidence processing use external services. Always async — poll the returned pol...

x402-api.aubr.ai Databases & Storage 1,263 calls / 30d checked 2026-10-31
0.03 USDC per call per call

Id x402 REST usage

Look up a single Twitter/X tweet by its numeric tweet ID. Returns full tweet data including text, author profile, creation date, engagement metrics (likes, retweets, replies, quotes, bookmarks), and referenced tweets. Qu...

x402.twit.sh Databases & Storage 603 calls / 30d checked 2026-10-31
0.0025 USDC per call per call

Allium x402 REST usage

API request: /api/v1/explorer/queries/run-async

agents.allium.so Databases & Storage 74 calls / 30d checked 2026-10-29
0.01 USDC per call per call

Query x402 REST usage

Korean rates and FX: Bank of Korea base rate, KOFR, CD, CP, KTB yields 1y-50y (ECOS) and won exchange rates (KEXIM, customs) for a date, from an English or Korean question. Official values with series id, date and source...

x402.pokt-agent.com Databases & Storage 29 calls / 30d checked 2026-10-31
0.005 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 Masters.
Network Scheme Amount Asset
Base exact 0.003 USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 3000 = 0.003 USDC per call on Base.

What you can call

access: payment per call (x402)

endpoint https://chess402.vercel.app/api/masters

Request

{
    "body": {
        "fen": "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
        "moves": 12,
        "play": "e2e4,e7e5",
        "topGames": 4
    },
    "bodyType": "json",
    "method": "POST",
    "type": "http"
}

Response

{
    "example": {
        "black": 198217,
        "draws": 311203,
        "moves": [
            {
                "averageRating": 2434,
                "black": 64210,
                "draws": 98421,
                "game": null,
                "opening": {
                    "eco": "C42",
                    "name": "Russian Game"
                },
                "san": "Nf3",
                "uci": "g1f3",
                "white": 152340
            }
        ],
        "opening": {
            "eco": "C20",
            "name": "King's Pawn Game"
        },
        "topGames": [
            {
                "black": {
                    "name": "Carlsen, M.",
                    "rating": 2882
                },
                "id": "Sxov6E94",
                "month": "2019-08",
                "uci": "g1f3",
                "white": {
                    "name": "Caruana, F.",
                    "rating": 2818
                },
                "winner": "white",
                "year": 2019
            }
        ],
        "white": 482141
    },
    "type": "json"
}

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

Opportunity insights

2 findings from measured data
  • Payment attribution is blocked

    The payout address is shared with 3 other service(s). That is normal for facilitator and platform addresses, and it is why this profile shows no inflow figure. The volume exists — it just cannot be split without inventing a rule.

    How attribution works →
  • Category benchmark

    11 of 2,078 services (0.5%) in Databases & Storage have attributable inflows; 306 have a source-measured call count. Median measured calls: 2.

    Rank this category by observed inflows →

What the provider says

Masters opening explorer for a position. Returns top moves, win/draw/loss rates, and recent top master games from the Lichess masters database.

Quoted from x402 Bazaar · source record · read 2026-10-31


Facts and where they come from

Price
0.003 USDC per call Provider claim
Recorded value: 0.003 USDC per call.
Unit
per call
Protocol
x402, REST · transport: HTTP Provider claim
Auth
x402
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
4 calls · 4 unique payers in the 30 days before 2026-10-25. 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 —
Attribution Shared
Receipt ledger Not connected

Attribution blocked · confidence low
The payout address is also published by 3 other service(s); the volume cannot be attributed to one of them.

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 an activity value of $0.01 — the source's call count multiplied by the published price. That is what the list price implies, not what anyone paid. The payout address is also published by 3 other service(s); the volume cannot be attributed to one of them.

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
0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f
0.003 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://chess402.vercel.app/api/masters
Evidence

Als Resource-URL im Bazaar-Eintrag geführt.

api.cdp.coinbase.com 2026-10-31
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 2026-10-31
Payment Provider claim
1 rail: Base · payee 0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f
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 2026-10-31
Pricing Provider claim
0.003 USDC per call
Evidence

Atomic amount 3000 = 0.003 USDC per call on Base. Netzwerk: Base.

api.cdp.coinbase.com 2026-10-31
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 2026-10-31
Provider Provider claim
chess402.vercel.app
Evidence

Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.

api.cdp.coinbase.com 2026-10-31
Usage Verified
4 calls / 4 unique payers in the last 30 days
Evidence

Source-reported usage from Coinbase x402 Bazaar, read on 2026-10-31. Letzter Aufruf laut Quelle: 2026-10-25T14:40:35.563Z. Aufrufe sind kein Umsatz.

api.cdp.coinbase.com 2026-10-31

Endpoint checks

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