claude-sonnet-api

x402 resource x402 REST

x402.agentindex.world · x402.agentindex.world · AI Models & Inference

Provider site ↗

Claude Sonnet API - pay per call, no API key. OpenAI-format chat completions on anthropic/claude-sonnet-5.5, pinned to Anthropic's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout - never charged if

Price per call 0.001892 USDC per call published unit: per call

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

Payers · 30d 2 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 2026-11-01

Observed inflows · last 30 days

No inflow observed in this window

The payout address is also published by 116 other service(s); the volume cannot be attributed to one of them.

Observed inflows by window for claude-sonnet-api.
Window	Observed	Transfers
Last complete day (2026-10-31)	—	—
Last 7 days	—	—
Last 30 days	—	—
Growth, 7d against the 7 before	not comparable

Source: on-chain transfer scan (USDC on Base) Window: 2026-10-02 → 2026-10-31 Scanned: 30/30 days Sample: 0 days with a measurement First seen: never 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 claude-sonnet-api.
Network	Full wallet address	Evidence
Base	0xb3f32bdfe8d07825bc0d7387295ab1d7559ba69d	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 AI Models & Inference

BlockRun.AI 94,088 calls · 0.002 USDC per call —
ClawFetch 3,016 calls · 0.001 USDC per call —
Completions 1,637 calls · 0.003301 USDC per call $133,236.29
a2apay Agent Query 1,127 calls · 0.028 USDC per call —
Chat completions - metered (pay 804 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 2,796 services in this category

With a measured call count	921 (32.9 %)
With a published price	1,082 (38.7 %)
With attributable inflows	40 (1.4 %)
Observed inflows · 30d	$135,812.42
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 94,088 calls / 30d checked 2026-11-01

0.002 USDC per call per call

ClawFetch 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 3,016 calls / 30d checked 2026-11-01

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 1,637 calls / 30d checked 2026-11-01

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 1,127 calls / 30d checked 2026-11-01

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 claude-sonnet-api.
Network	Scheme	Amount	Asset
Base	exact	0.001892	USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 1892 = 0.001892 USDC per call on Base.

What you can call

access: payment per call (x402)

endpoint https://x402.agentindex.world/llm/claude-sonnet

Request

{
    "body": {
        "max_tokens": 150,
        "messages": [
            {
                "content": "Summarize in one sentence: The Eiffel Tower is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It was designed by Gustave Eiffel's engineering company and built as the entrance arch for the 1889 World's Fair. Initially criticized by some of France's leading artists and intellectuals for its design, it has become a global cultural icon of France and one of the most recognizable structures in the world, attracting millions of visitors every year.",
                "role": "user"
            }
        ]
    },
    "bodyType": "json",
    "method": "POST",
    "type": "http"
}

Response

{
    "example": {
        "choices": [
            {
                "finish_reason": "stop",
                "index": 0,
                "message": {
                    "content": "The Eiffel Tower, a wrought-iron lattice tower in Paris designed by Gustave Eiffel's company for the 1889 World's Fair, was initially criticized by prominent French artists and intellectuals but has since become a globally recognized cultural icon that draws millions of visitors annually.",
                    "role": "assistant"
                }
            }
        ],
        "created": 1790780999,
        "id": "gen-1790780999-5D8mNBe2jJJ4gO8UyUsm",
        "model": "anthropic/claude-sonnet-5.5",
        "object": "chat.completion",
        "provider": "Anthropic",
        "usage": {
            "completion_tokens": 100,
            "cost": 0.00132,
            "prompt_tokens": 160,
            "total_tokens": 260
        },
        "x402_receipt": {
            "latency_ms": 1700,
            "model_served": "anthropic/claude-sonnet-5.5",
            "price_paid_usdc": 0.001892,
            "upstream": "llm/claude-sonnet"
        }
    },
    "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 116 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

40 of 2,796 services (1.4%) in AI Models & Inference have attributable inflows; 921 have a source-measured call count. Median measured calls: 2.
Rank this category by observed inflows →

What the provider says

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

Facts and where they come from

Price: 0.001892 USDC per call Provider claim
Recorded value: 0.001892 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://x402.agentindex.world/llm/claude-sonnet
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: 2 calls · 2 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 —

Attribution Shared

Receipt ledger Not connected

Attribution blocked · confidence low
The payout address is also published by 116 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 $0.00 — 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 116 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

0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d

0.001892 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://x402.agentindex.world/llm/claude-sonnet 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 0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d 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	0.001892 USDC per call Evidence Atomic amount 1892 = 0.001892 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	x402.agentindex.world 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	2 calls / 2 unique payers in the last 30 days Evidence Source-reported usage from Coinbase x402 Bazaar, read on 2026-11-01. Letzter Aufruf laut Quelle: 2026-10-08T06:08:41.948Z. 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

0.001892 USDC per call

price checked 2026-11-01 Open at x402.agentindex.world

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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