HTTP/1.1 402 PAYMENT REQUIRED agent402.base.eth · BASE · SOLANA · POLYGON · ARBITRUM · MONAD · CELO · AVALANCHE · STELLAR · ALGORAND · ROBINHOOD · USDC · USDG
MARKETPLACE / basesolanapolygonarbitrummonadceloavalanchestellaralgorandrobinhood all chains →

The Celo x402 marketplace

Pay-per-call tools for AI agents - settled in USDC on Celo in ~1 second, no signup, no API keys. The wallet is the account.

An open index of the whole Celo x402 economy - this host plus every independent seller the hourly crawl finds (CDP Bazaar included). Not a walled market: other venues' listings appear here too.

Latest settlement: $0.005 USDC · on-chain receipt · 2026-07-20T16:42:21.000Z

A paid canary buys tools over the Celo rail daily (facilitator: x402.celo.org) - uptime proven with real settlements, not pings.

·· RAIL MANIFEST ··CELO · MAINNET
networkeip155:42220
assetUSDC
settle latency~1 second
facilitatorCelo
gassponsored
daily canary✓ settled 10h ago
agents: GET /api/route?q=<task>&network=celo
SELLERS LISTED
1
reachable in the open index right now
TOOLS (THIS HOST)
510
LATEST SETTLE
$0.005
PRICE FLOOR
$0.001

Activity

THIS HOST · PAST 30 DAYS
TRANSACTIONS
5
VOLUME
$0.04
BUYERS
1

all inbound USDC settlements to this host's Celo wallet · includes 5 internal canary buys

Sellers settling on Celo

pick a seller to scope the activity charts · THIS HOST = run by agent402 · every other seller is independent, found by the open crawl · tx = settled calls, last 7 days on-chain

Agent402.Tools (agent402.base.eth) THIS HOST
agent402.tools
510 tools · 1,290 tx live
activity shown above

1 seller live - discovery is open, and external sellers are added automatically when their x402 challenges advertise the Celo network.

Browse Celo-payable tools

Live public data

US gov dataset search$0.003
US weather alerts$0.003
Recent earthquakes (USGS)$0.003
FDA drug recalls$0.004
FDA food recalls$0.004
FDA drug adverse events$0.004
+ 105 more in the full catalog

skill-pack

Skill: Earnings deep-dive$0.05
Skill: Options analytics$0.05
Skill: Fixed-income desk$0.05
Skill: DeFi protocol scanner$0.05
Skill: Security audit$0.12
Skill: Email deliverability$0.10
+ 95 more in the full catalog

crypto

Crypto order book$0.003
Stablecoin peg monitor$0.003
Wallet balance (native + ERC-20)$0.002
ERC-20 token metadata$0.001
Token spot price (USD)$0.001
Wallet transaction history$0.002
+ 42 more in the full catalog

Web & documents

Extract article$0.01
Page metadata$0.002
Browser render$0.02
Screenshot$0.01
PDF to text$0.01
Web search$0.02
+ 30 more in the full catalog

Data conversion

JSON validate & format$0.001
JSON to CSV$0.002
CSV to JSON$0.002
YAML to JSON$0.002
JSON to YAML$0.002
XML to JSON$0.002
+ 24 more in the full catalog

Text processing

Slugify$0.001
Case convert$0.001
Text statistics$0.001
Keyword extraction$0.002
Text diff$0.002
Regex test$0.001
+ 21 more in the full catalog

Validation & parsing

Email validate$0.002
URL parse$0.001
IP info$0.002
User-agent parse$0.001
Color convert$0.001
Semver parse/compare$0.001
+ 17 more in the full catalog

Encoding & crypto

Hash$0.001
HMAC$0.001
Base64$0.001
Hex$0.001
URL encode/decode$0.001
JWT decode$0.001
+ 14 more in the full catalog

Network & domains

DNS lookup$0.001
HTTP check$0.003
TLS certificate$0.003
Domain WHOIS (RDAP)$0.005
Robots.txt check$0.002
Sitemap reader$0.003
+ 12 more in the full catalog

Payments & x402

x402 market pulse$0.01
x402 quote$0.003
USDC balance$0.003
Transaction status$0.003
Gas price$0.002
Verify x402 settlement$0.004
+ 11 more in the full catalog

ai

LLM inference$0.01
LLM inference (Pro)$0.10
LLM inference (Premium)$0.50
Image generation$0.03
Image generation (HD)$0.10
Image generation (Premium)$0.30
+ 9 more in the full catalog

Math & finance

Calculator$0.002
Statistics$0.001
Unit convert$0.001
Percentage$0.001
Number format$0.001
CIDR calculator$0.002
+ 7 more in the full catalog

agents: GET https://agent402.tools/api/route?q=<task>&network=celo

Sell on Celo

Accept the Celo CAIP-2 network (eip155:42220) in your 402 challenge - the Celo facilitator verifies and settles native Circle USDC, gas sponsored. Use @x402/evm for the server-side scheme, or agent402-tollbooth to paywall an existing site. Then serve /.well-known/x402 - list it on /sell (free) and the index crawler picks it up; ranking is health-based, listing is free. Want a guaranteed crawl? Open a seed request.

List your API
Free, no account - we probe your origin's x402 surface and list you if it answers. Ranking is health-based.
402 challenge · accepts[]JSON
{
  "scheme": "exact",
  "network": "eip155:42220",
  "asset": "USDC",
  "payTo": "your-wallet"
}

machine-readable: /api/route?network=celo · /.well-known/x402 · /openapi.json · /api/reliability