x402-payment-test

Name: x402-payment-test service
Creator: Agent GDP
License: https://creativecommons.org/licenses/by/4.0/

The service's listing describes it this way: Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample. Website

A service is a tool an AI agent pays to call. x402-payment-test is listed on this page under Identity / verification, settling on Base, through x402. 30-day settled volume on this page is $0.10. The listing comes from the service catalog. Open a row for payments, payers, and chains. See Bazaar, agent payment use cases, and the methodology.

FacilitatorsCoinbase

Payee

0x3ced…45ecBase
0xb3f3…a69dBase

Methodology · settled volume through 2026-10-26 · catalog Oct 26, 2026, 2:02 PM UTC

Settled volume, payments, payers, average payment, use-case share, and rank
Metric	24h	7d	30d
Volume	$0.08	$0.10	$0.10
Payments	78	99	99
Payers	76	15	15
Avg payment	$0.001	$0.0011	$0.0011
Share of Identity / verification	0.1%	0.0%	0.0%
Use-case rank	#11	#17	#18

Payers can be counted more than once when they paid through more than one facilitator.

Settled volume

$0.10

n/a

Payments

Payers

Avg payment

$0.0011

volume / payments

Daily volume and buyers

90D 1Y All

Data through Oct 26, 2026. Source: public settlement logs. Methodology

Payers

Buyer concentration

25.7%

Top payer's share of lifetime volume. Not the period selected above.

Repeat buyers

72.7%

Lifetime buyers with more than one payment, divided by all buyers.

Endpoints and prices

Price, network, and asset come from the x402 Bazaar catalog.

Endpoint	Network	Asset	Price	Scheme
https://x402.agentindex.world/x402-echo Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample.	base	USDC	$0.001	exact
https://x402.agentindex.world/geo/distance Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.	base	USDC	$0.001	exact
https://x402.agentindex.world/extract Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Try GET /extract/sample. Part of the Age	base	USDC	$0.002	exact
https://x402.agentindex.world/agent-health Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET /agent-health/sample.	base	USDC	$0.001	exact
https://x402.agentindex.world/time/format Format an ISO 8601 datetime using a strftime pattern.	base	USDC	$0.001	exact
https://x402.agentindex.world/weather Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.	base	USDC	$0.001	exact
https://x402.agentindex.world/gas-price Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.	base	USDC	$0.001	exact
https://x402.agentindex.world/time/business-days Count weekdays (Mon-Fri) between two dates, inclusive of both endpoints.	base	USDC	$0.001	exact
https://x402.agentindex.world/wallet-balance Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try GET /wallet-balance/sample.	base	USDC	$0.001	exact
https://x402.agentindex.world/base/block-number Latest Base mainnet block height via eth_blockNumber - the current chain tip.	base	USDC	$0.001	exact
https://x402.agentindex.world/number/roman Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer.	base	USDC	$0.001	exact
https://x402.agentindex.world/validate/iban ISO 13616 IBAN mod-97 checksum validation, with optional BIC (ISO 9362) format check.	base	USDC	$0.002	exact
https://x402.agentindex.world/fact-check Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contradicts/neutral). Answer in a few seconds. Try GET /fact-check/sample. Independently monitored: lumierepaycheck.o	base	USDC	$0.02	exact
https://x402.agentindex.world/search Jev-routed web search: each query goes to the best specialised source (code, facts, news, prices), results ranked by relevance. 28/30 test queries answered. Up to 10 results per query, each with title, URL, snippet, short extract and publish date. Up to 5 queries per call, merged	base	USDC	$0.01	exact
https://x402.agentindex.world/time/humanize Human-readable relative time ('2 hours ago', 'in 3 days') between a datetime and a reference (default now).	base	USDC	$0.002	exact
https://x402.agentindex.world/decide Ask up to 20 typed yes/no, multiple-choice or ordinal-scale questions about one shared piece of context in a single call - each answered with a real probability (Jev decision primitives), not generated text. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or	base	USDC	$0.001	exact
https://x402.agentindex.world/encoding/transcode Convert text between utf-8, base64, hex, URL-percent-encoding and ascii representations.	base	USDC	$0.002	exact
https://x402.agentindex.world/json/flatten Flatten a nested JSON document into single-level dotted-path keys.	base	USDC	$0.001	exact
https://x402.agentindex.world/research Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare mis	base	USDC	$0.005	exact
https://x402.agentindex.world/summarize Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capab	base	USDC	$0.002	exact
https://x402.agentindex.world/text/slug Slugify text: strip accents, lowercase, replace non-alphanumerics with a separator.	base	USDC	$0.002	exact
https://x402.agentindex.world/token-card Base token safety check: Claude Haiku 5.5 (Anthropic) writes a rug pull / honeypot verdict (SAFE/CAUTION/RISKY/DANGER) from on-chain data, a tagline, a short explanation. Deterministic fallback if Claude is slow, honestly labeled. GET /token-card/sample.	base	USDC	$0.02	exact
https://x402.agentindex.world/translate Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source language auto-detected, automatic fallback a	base	USDC	$0.002	exact
https://x402.agentindex.world/v1/chat/completions 437 models, no account, no API key, pay per call in USDC - OpenAI-compatible chat completions and AI inference gateway (Claude, GPT, Gemini, Llama, Mistral and more in one endpoint). Price: from $0.001, computed from your max_tokens × model rate × 1.10 (you sign a ceiling; unused	base	USDC	$0.001	exact

Facilitators used

Facilitator	Volume	Tx	Share
Coinbasex402	$0.10	99	100.0%

Other services in Identity / verification

All in this use case

Laso Finance#1 · $818.37 30d
InjectScan by AgentGate#2 · $253.89 30d
api.craigmbrown.com#3 · $55.39 30d
SAVER Verifier Fact Checking#4 · $3.00 30d
fractalai.net.co#5 · $2.44 30d

How we count x402-payment-test

We read settlements directly from each chain's public records and refresh them every few minutes.

Data through 2026-10-26. Source: public settlement logs.

Full methodology → · How we compare with other trackers →

Cite this

APA

Agent GDP. (2026). x402-payment-test [Data set]. Retrieved October 26, 2026, from https://agentgdp.io/service/x402.agentindex.world.

MLA

"x402-payment-test." Agent GDP, 26 Oct. 2026, https://agentgdp.io/service/x402.agentindex.world.

BibTeX

@misc{agentgdp_x402_payment_test_2026,
  author = {{Agent GDP}},
  title = {x402-payment-test},
  year = {2026},
  url = {https://agentgdp.io/service/x402.agentindex.world},
  note = {Retrieved October 26, 2026. Data through 2026-10-26. Licensed under CC BY 4.0.},
  license = {https://creativecommons.org/licenses/by/4.0/}
}

Plain text

x402-payment-test: $0.10 settled volume (7d), 99 payments, 15 buyers. Agent GDP, data through 2026-10-26. https://agentgdp.io/service/x402.agentindex.world Retrieved October 26, 2026.

Data from Agent GDP (https://agentgdp.io/service/x402.agentindex.world), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

Payers on a day can be counted more than once if they paid through more than one facilitator. Growth compares this period with the previous period of the same length. The page link uses the service's site when we have one, and the payee address otherwise.

Volume and payment counts include earlier days. Transaction-level detail available from October 23, 2026.

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Cite this

APA

Agent GDP. (2026). Service settled volume [Data set]. Retrieved October 26, 2026, from https://agentgdp.io/service/x402.agentindex.world.

MLA

"Service settled volume." Agent GDP, 26 Oct. 2026, https://agentgdp.io/service/x402.agentindex.world.

BibTeX

@misc{agentgdp_service_settled_volume_2026,
  author = {{Agent GDP}},
  title = {Service settled volume},
  year = {2026},
  url = {https://agentgdp.io/service/x402.agentindex.world},
  note = {Retrieved October 26, 2026. Licensed under CC BY 4.0.},
  license = {https://creativecommons.org/licenses/by/4.0/}
}

Plain text

Service settled volume. Agent GDP. https://agentgdp.io/service/x402.agentindex.world. Retrieved October 26, 2026.

Data from Agent GDP (https://agentgdp.io/service/x402.agentindex.world), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

Metric

24h

30d

Volume

$0.08

$0.10

Payments

Payers

Avg payment

$0.001

$0.0011

Share of Identity / verification

0.1%

0.0%

Use-case rank

#11

#17

#18

Daily settled volume for x402-payment-test

Time

Daily settled volume for x402-payment-test

2026-10-23

$0.00

2026-10-24

$0.00

2026-10-25

$0.10

2026-10-26

$0.00

Daily buyers for x402-payment-test

Time

Daily buyers for x402-payment-test

2026-10-23

2026-10-24

2026-10-25

2026-10-26

Endpoint

Network

Asset

Price

Scheme

https://x402.agentindex.world/x402-echo

Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample.

base

USDC

$0.001

exact

https://x402.agentindex.world/geo/distance

Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.

base

USDC

$0.001

exact

https://x402.agentindex.world/extract

Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Try GET /extract/sample. Part of the Age

base

USDC

$0.002

exact

https://x402.agentindex.world/agent-health

Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET /agent-health/sample.

base

USDC

$0.001

exact

https://x402.agentindex.world/time/format

Format an ISO 8601 datetime using a strftime pattern.

base

USDC

$0.001

exact

https://x402.agentindex.world/weather

Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.

base

USDC

$0.001

exact

https://x402.agentindex.world/gas-price

Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.

base

USDC

$0.001

exact

https://x402.agentindex.world/time/business-days

Count weekdays (Mon-Fri) between two dates, inclusive of both endpoints.

base

USDC

$0.001

exact

https://x402.agentindex.world/wallet-balance

Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try GET /wallet-balance/sample.

base

USDC

$0.001

exact

https://x402.agentindex.world/base/block-number

Latest Base mainnet block height via eth_blockNumber - the current chain tip.

base

USDC

$0.001

exact

https://x402.agentindex.world/number/roman

Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer.

base

USDC

$0.001

exact

https://x402.agentindex.world/validate/iban

ISO 13616 IBAN mod-97 checksum validation, with optional BIC (ISO 9362) format check.

base

USDC

$0.002

exact

https://x402.agentindex.world/fact-check

Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contradicts/neutral). Answer in a few seconds. Try GET /fact-check/sample. Independently monitored: lumierepaycheck.o

base

USDC

$0.02

exact

https://x402.agentindex.world/search

Jev-routed web search: each query goes to the best specialised source (code, facts, news, prices), results ranked by relevance. 28/30 test queries answered. Up to 10 results per query, each with title, URL, snippet, short extract and publish date. Up to 5 queries per call, merged

base

USDC

$0.01

exact

https://x402.agentindex.world/time/humanize

Human-readable relative time ('2 hours ago', 'in 3 days') between a datetime and a reference (default now).

base

USDC

$0.002

exact

https://x402.agentindex.world/decide

Ask up to 20 typed yes/no, multiple-choice or ordinal-scale questions about one shared piece of context in a single call - each answered with a real probability (Jev decision primitives), not generated text. Powered by Jev (TypeSafe System One). $0.001 per call, no OpenRouter or

base

USDC

$0.001

exact

https://x402.agentindex.world/encoding/transcode

Convert text between utf-8, base64, hex, URL-percent-encoding and ascii representations.

base

USDC

$0.002

exact

https://x402.agentindex.world/json/flatten

Flatten a nested JSON document into single-level dotted-path keys.

base

USDC

$0.001

exact

https://x402.agentindex.world/research

Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare mis

base

USDC

$0.005

exact

https://x402.agentindex.world/summarize

Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capab

base

USDC

$0.002

exact

https://x402.agentindex.world/text/slug

Slugify text: strip accents, lowercase, replace non-alphanumerics with a separator.

base

USDC

$0.002

exact

https://x402.agentindex.world/token-card

Base token safety check: Claude Haiku 5.5 (Anthropic) writes a rug pull / honeypot verdict (SAFE/CAUTION/RISKY/DANGER) from on-chain data, a tagline, a short explanation. Deterministic fallback if Claude is slow, honestly labeled. GET /token-card/sample.

base

USDC

$0.02

exact

https://x402.agentindex.world/translate

Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source language auto-detected, automatic fallback a

base

USDC

$0.002

exact

https://x402.agentindex.world/v1/chat/completions

437 models, no account, no API key, pay per call in USDC - OpenAI-compatible chat completions and AI inference gateway (Claude, GPT, Gemini, Llama, Mistral and more in one endpoint). Price: from $0.001, computed from your max_tokens × model rate × 1.10 (you sign a ceiling; unused

base

USDC

$0.001

exact

Facilitator

Volume

Coinbasex402

$0.10

100.0%

Cite this

APA

Agent GDP. (2026). x402-payment-test [Data set]. Retrieved October 26, 2026, from https://agentgdp.io/service/x402.agentindex.world.

MLA

"x402-payment-test." Agent GDP, 26 Oct. 2026, https://agentgdp.io/service/x402.agentindex.world.

BibTeX

@misc{agentgdp_x402_payment_test_2026,
  author = {{Agent GDP}},
  title = {x402-payment-test},
  year = {2026},
  url = {https://agentgdp.io/service/x402.agentindex.world},
  note = {Retrieved October 26, 2026. Data through 2026-10-26. Licensed under CC BY 4.0.},
  license = {https://creativecommons.org/licenses/by/4.0/}
}

Plain text

x402-payment-test: $0.10 settled volume (7d), 99 payments, 15 buyers. Agent GDP, data through 2026-10-26. https://agentgdp.io/service/x402.agentindex.world Retrieved October 26, 2026.

Data from Agent GDP (https://agentgdp.io/service/x402.agentindex.world), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).

Get your badge

Paste this on your site. It says Indexed by Agent GDP, with this name, and it links back to this page.

Source: agentgdp.io · Beta

HTML

<a href="https://agentgdp.io/service/x402.agentindex.world?utm_source=badge"><img src="https://agentgdp.io/badge/service/x402.agentindex.world.svg" alt="x402.agentindex.world · Indexed by Agent GDP" /></a>