Exa grounded answer

x402 resource x402 REST

agent402.tools · agent402.tools · Search & Research

Provider site ↗

Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every claim can be checked. Model-backed: the answer text is generated, the citations

Price per call 0.01 USDC per call published unit: per call

Calls · 30d — not reported by any source

Payers · 30d — not reported by any source

Observed inflows · 30d — not attributable

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

Payment evidence Rail not scanned confidence: low · read 2026-10-29

Observed inflows · last 30 days

No inflow observed in this window

The rail is not an EVM address, and our transfer scan currently covers USDC on Base only.

Observed inflows by window for Exa grounded answer.
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 Exa grounded answer.
Network	Full wallet address	Evidence
Solana	J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg	Shared address · activity cannot be assigned to this serviceFrom source record · source: payai

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 Search & Research

Exa 8,652 calls · 0.007 USDC per call —
Pocket Network 5,345 calls · 0.005 USDC per call $432.22
StableTravel 4,437 calls · 0.02 USDC per call $118.87
Search 3,416 calls · 0.006 USDC per call —
Search 2,200 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 17,250 services in this category

With a measured call count	10,526 (61.0 %)
With a published price	11,024 (63.9 %)
With attributable inflows	111 (0.6 %)
Observed inflows · 30d	$3,430.61
Median measured calls	2
Median price per call	$0.01

Similar services

All of Search & Research →

Exa x402 REST usage

Exa /search endpoint

api.exa.ai Search & Research 8,652 calls / 30d checked 2026-10-31

0.007 USDC per call per call

Pocket Network x402 REST usage

Web search built for agents, served over Pocket Network: POST /v1/search with a query and an optional max_results, and get the results back as one JSON object. Results vary run to run, as web search does. GET /v1/version...

agent.pocket.network Search & Research 5,345 calls / 30d checked 2026-10-31

0.005 USDC per call per call

StableTravel x402 REST usage

Search cached Seats.aero award availability by origin, destination, dates, cabin, carriers, and pagination.

stabletravel.dev Search & Research 4,437 calls / 30d checked 2026-10-31

0.02 USDC per call per call

Search x402 REST usage

Search Twitter/X tweets with advanced filters. Returns up to 20 tweets per page, most recent first, with pagination. At least one filter required. Params: words, phrase, anyWords, noneWords, hashtags, from, to, mentionin...

x402.twit.sh Search & Research 3,416 calls / 30d checked 2026-10-31

0.006 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 Exa grounded answer.
Network	Scheme	Amount	Asset
Solana	exact	0.01	USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 10000 = 0.01 USDC per call on Solana.

What you can call

access: payment per call (x402)

endpoint https://agent402.tools/api/exa-answer

Request

{
    "body": {
        "query": "What is the x402 payment protocol and who uses it?"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
}

Response

{
    "type": "json",
    "example": {
        "query": "What is the x402 payment protocol and who uses it?",
        "answer": "x402 is an HTTP-native payment protocol that settles stablecoin payments per request ...",
        "source": "exa",
        "citations": [
            {
                "url": "https://example.com/x402-explained",
                "text": null,
                "title": "What is the x402 payment protocol?",
                "author": null,
                "publishedDate": "2026-08-02T00:00:00.000Z"
            }
        ],
        "fetchedAt": "2026-09-13T20:00:00.000Z",
        "citationCount": 1
    }
}

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

Opportunity insights

2 findings from measured data

Priced, but nothing observed arriving

A price is published, yet no transfer reached the payout address in the last 30 days. Either the buyers pay elsewhere, the volume is below one cent, or the endpoint is dormant. Only 111 of 17250 services in this category have attributable inflows at all.
Services here that do show inflows →
Category benchmark

111 of 17,250 services (0.6%) in Search & Research have attributable inflows; 10,526 have a source-measured call count. Median measured calls: 2.
Rank this category by observed inflows →

What the provider says

Quoted from PayAI · source record · read 2026-10-29

Facts and where they come from

Price: 0.01 USDC per call Provider claim
Recorded value: 0.01 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://agent402.tools/api/exa-answer
Source: PayAI · Public discovery API (provider-published records)
Last checked: Not checked by us yet — the data is as the source published it
First seen: 2026-10-26

Money, and what it actually proves

Verified revenue · 30d Unknown

Observed inflows · 30d —

Attribution Unscanned

Receipt ledger Not connected

Rail not scanned · confidence low
The rail is not an EVM address, and our transfer scan currently covers USDC on Base only.

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 nothing measurable: no price, no attributable address, no receipt. The rail is not an EVM address, and our transfer scan currently covers USDC on Base only.

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

Solana · exact · USDC

J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg

0.01 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://agent402.tools/api/exa-answer Evidence Als Resource-URL im Bazaar-Eintrag geführt.	facilitator.payai.network	2026-10-29
Input output	Provider claim	Request/response examples published with the listing Evidence Beispiel-Ein- und -Ausgabe stammen aus dem Bazaar-Eintrag des Anbieters.	facilitator.payai.network	2026-10-29
Payment	Provider claim	1 rail: Solana · payee J7aN3PLJnTCF5qpEnvJHJsnCjcGuqC2rYtEM8Gv3xwg 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.	facilitator.payai.network	2026-10-29
Pricing	Provider claim	0.01 USDC per call Evidence Atomic amount 10000 = 0.01 USDC per call on Solana. Netzwerk: Solana.	facilitator.payai.network	2026-10-29
Protocol	Provider claim	x402 (HTTP 402 payment challenge) Evidence Im x402 Bazaar als zahlungspflichtige HTTP-Ressource gelistet (x402Version 2, Typ http).	facilitator.payai.network	2026-10-29
Provider	Provider claim	agent402.tools Evidence Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.	facilitator.payai.network	2026-10-29

Endpoint checks

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

Price

0.01 USDC per call

price checked 2026-10-29 Open at agent402.tools

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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