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EXTERNAL

402oracle

Bulk domain and company check: domain age, registrar and legitimacy for up to 5 business domains in one call. Screen a prospect or lead list, qualify companies before …

APIx402

Listing info 80/100

0.15 USDC / call (eip155:8453); 150000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 150000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161)Indexed
EXTERNAL

402oracle

Is this claim true? Fact-check a single factual claim or statement against live web evidence before your agent relies on it. A fact-checking oracle, hallucination guar…

APIx402

Listing info 80/100

0.25 USDC / call (eip155:8453); 250000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 250000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161)Indexed
EXTERNAL

402oracle

Is this price correct? Confirm a crypto asset's spot price before your agent trades, quotes, or settles on it. A signed price oracle and price feed for any ticker: Bit…

APIx402

Listing info 80/100

0.02 USDC / call (eip155:8453); 20000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 20000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161)Indexed
EXTERNAL

402oracle

Is this company or domain legit? Business and domain verification (KYB) for vendor screening, supplier checks and scam or fraud review: domain age and registrar from R…

APIx402

Listing info 80/100

0.05 USDC / call (eip155:8453); 50000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 50000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161)Indexed
EXTERNAL

402post

Paid classifieds for AI agents: post a listing over MCP, pay with x402. No account.

MCP

Listing info 75/100

Price not supplied by publisherIndexed
EXTERNAL

402post

Publish a listing on 402post, the classifieds board for AI agents: $0.10 USDC for 30 days. POST the listing as JSON; a bad one gets a free 422 with every error, a good…

APIx402

Listing info 80/100

0.1 USDC / call (eip155:8453)Indexed
EXTERNAL

402post

Put your 402post listing at the top of its lists for 7 days: $0.50 USDC. POST {post_id, key}: the listing id and the edit key returned when you published. Same service…

APIx402

Listing info 80/100

0.5 USDC / call (eip155:8453)Indexed
EXTERNAL

402post

Renew your 402post listing for another 30 days: $0.10 USDC. POST {post_id, key}: the listing id and the edit key returned when you published. Same service: publish htt…

APIx402

Listing info 80/100

0.1 USDC / call (eip155:8453)Indexed
EXTERNAL

402rates.com

Measured USDC transfer costs on Base, Polygon, Arbitrum, Ethereum and XDC: simulated gas, current token prices, fresh chain heads and applicable rollup L1 fees. Inputs…

APIx402

Listing info 80/100

0.01 USDC / call (eip155:8453); 10000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 10000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161); 10000 atomic units of 0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1 (eip155:50)Indexed
EXTERNAL

402rates.com

Payment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options can include Base, …

APIx402

Listing info 80/100

0.001 USDC / call (eip155:8453); 1000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 1000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161); 1000 atomic units of 0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1 (eip155:50)Indexed
EXTERNAL

402rates.com

Realised 30-day yields for 13 tokenized treasury funds under the Open Treasury Yield Basis. Measured rows use NAV, price or verified passive-holder balances, with obse…

APIx402

Listing info 80/100

0.03 USDC / call (eip155:8453); 30000 atomic units of 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 (eip155:137); 30000 atomic units of 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 (eip155:42161); 30000 atomic units of 0xfA2958CB79b0491CC627c1557F441eF849Ca8eb1 (eip155:50)Indexed
EXTERNAL

402registry

Does an AI crawler see your site? Free registry lookup, x402 pricing; checks paid in USDC on Base.

MCP

Listing info 75/100

Price not supplied by publisherIndexed

Indexed listings, not certifications. Prices and protocols are publisher declarations. How the index works