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OpenCheap

x402 resource x402 REST

api.opencheap.si · api.opencheap.si · AI Models & Inference

Provider site ↗

Price per call 0.001 USDC per call published unit: per call

Calls · 30d 2 counted by the source, no daily split

Payers · 30d 1 distinct paying addresses seen by the source

Observed inflows · 30d $0.002 2 transfers to the payout address

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

Payment evidence Observed transfers confidence: medium · read 2026-10-30

Observed inflows · last 30 days

$0.01USD observed / day

2026-10-01grey = not scanned · UTC days2026-10-30

Observed inflows by window for OpenCheap.
Window	Observed	Transfers
Last complete day (2026-10-30)	$0.001	1
Last 7 days	$0.002	2
Last 30 days	$0.002	2
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: 30 days with a measurement First seen: 2026-10-01 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 OpenCheap.
Network	Full wallet address	Evidence
Base	0xa123e634f9555bf67d028c7e242a942d50dc8f25	Exclusive to this catalogue serviceFrom source record · source: x402_bazaar

Sending wallets · observed counterparties

All 1 retained sending addresses are listed below. Source: on-chain transfer scans. Dates are UTC days.

All retained sending wallet addresses observed for OpenCheap.
Network	Full wallet address	Transfers	First / last observed	Last scanned (UTC)
Base	0x3c36c6b44be628005b58a9e895151d9c1829f62c	2	2026-10-28 / 2026-10-30	2026-10-31 00:36:54

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 AI Models & Inference

BlockRun.AI 86,859 calls · 0.002 USDC per call —
Fetch 2,975 calls · 0.001 USDC per call —
Completions 1,634 calls · 0.003301 USDC per call $158,237.16
a2apay Agent Query 1,179 calls · 0.028 USDC per call —
Chat completions - metered (pay 801 calls · 0.001 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 2,746 services in this category

With a measured call count	893 (32.5 %)
With a published price	1,048 (38.2 %)
With attributable inflows	40 (1.5 %)
Observed inflows · 30d	$161,042.49
Median measured calls	2
Median price per call	$0.01

Similar services

All of AI Models & Inference →

BlockRun.AI x402 REST usage

AI chat completions API - pay per request with USDC on Base

blockrun.ai AI Models & Inference 86,859 calls / 30d checked 2026-10-31

0.002 USDC per call per call

Fetch x402 REST usage

Web scraping / URL fetch: retrieve any web page and return clean, LLM-ready markdown text. Strips boilerplate, ads, and navigation. Stealth HTTP client bypasses common bot blocks. Cheapest way to read a webpage.

api.clawfetch.ai AI Models & Inference 2,975 calls / 30d checked 2026-10-31

0.001 USDC per call per call

Completions x402 REST usage

Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.

api.surplusintelligence.ai AI Models & Inference 1,634 calls / 30d checked 2026-10-31

0.003301 USDC per call per call

a2apay Agent Query x402 REST usage

On-demand AI responses backed by autonomous ICP canisters. Submit a prompt, get an answer — redundant infrastructure, pay-per-query, no account required.

a2apay.io AI Models & Inference 1,179 calls / 30d checked 2026-10-31

0.028 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 OpenCheap.
Network	Scheme	Amount	Asset
Base	exact	0.001	USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 1000 = 0.001 USDC per call on Base.

What you can call

access: payment per call (x402)

endpoint https://api.opencheap.si/v1/chat/completions

Request

{
    "body": {
        "max_tokens": 256,
        "messages": [
            {
                "content": "Say hello in five words.",
                "role": "user"
            }
        ],
        "model": "glm-5.3-flash"
    },
    "bodyType": "json",
    "discoverable": true,
    "method": "POST",
    "type": "http"
}

Response

{
    "example": {
        "choices": [
            {
                "finish_reason": "stop",
                "index": 0,
                "message": {
                    "content": "Hello there, nice to meet!",
                    "role": "assistant"
                }
            }
        ],
        "id": "chatcmpl-123",
        "model": "glm-5.3-flash",
        "object": "chat.completion",
        "usage": {
            "completion_tokens": 7,
            "prompt_tokens": 14,
            "total_tokens": 21
        }
    },
    "type": "json"
}

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

Opportunity insights

2 findings from measured data

Two independent sources agree

The observed inflow implies about 2 calls at list price; the source counted 2 (factor 1). A transfer is still not a purchase, but the order of magnitude holds — this is the strongest monetisation signal in the catalogue short of a receipt feed.
Peers with attributed inflows →
Category benchmark

40 of 2,746 services (1.5%) in AI Models & Inference have attributable inflows; 893 have a source-measured call count. Median measured calls: 2.
Rank this category by observed inflows →

What the provider says

OpenAI-compatible chat completions for hundreds of open and closed models (DeepSeek, Kimi, GLM, Qwen, Llama, Claude, GPT, Gemini) through one endpoint, each call routed to the cheapest healthy provider for that model. Pay per call in USDC on Base with no API key or account: the 402 quotes this prompt plus max_tokens (up to 4,096). Streaming and tool calls supported. Model ids and prices: https://app.opencheap.si/api/v1/models

Quoted from x402 Bazaar · source record · read 2026-10-30

Facts and where they come from

Price: 0.001 USDC per call Provider claim
Recorded value: 0.001 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://api.opencheap.si/v1/chat/completions
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: 2026-10-28
Usage: 2 calls · 1 unique payers in the 30 days before 2026-10-30. 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 $0.002

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 $0.002 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 2 calls; the source counted 2. 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

0xa123E634f9555bf67d028C7e242A942D50dc8f25

0.001 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://api.opencheap.si/v1/chat/completions Evidence Als Resource-URL im Bazaar-Eintrag geführt.	api.cdp.coinbase.com	2026-10-30
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	2026-10-30
Payment	Provider claim	1 rail: Base · payee 0xa123E634f9555bf67d028C7e242A942D50dc8f25 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	2026-10-30
Pricing	Provider claim	0.001 USDC per call Evidence Atomic amount 1000 = 0.001 USDC per call on Base. Netzwerk: Base.	api.cdp.coinbase.com	2026-10-30
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	2026-10-30
Provider	Provider claim	api.opencheap.si Evidence Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.	api.cdp.coinbase.com	2026-10-30
Usage	Verified	2 calls / 1 unique payers in the last 30 days Evidence Source-reported usage from Coinbase x402 Bazaar, read on 2026-10-30. Letzter Aufruf laut Quelle: 2026-10-30T17:42:03.555Z. Aufrufe sind kein Umsatz.	api.cdp.coinbase.com	2026-10-30

Endpoint checks

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

Price

0.001 USDC per call

price checked 2026-10-30 Open at api.opencheap.si

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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