Discover / 402signal.com

402Signal

Not checked

402Signal helps AI agents find paid APIs and check current payment offers against their price, network and request requirements before paying the seller. A qualifying route costs $0.003 USDC; normal misses are free. Routing payments are supported on Base, Solana and Algorand. The seller's charge is separate.

x402
Base
Solana
USDC
Data

Checks: Not checked
In our index since: 14 Oct 2026

Endpoint

curl -i https://402signal.com/
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/402signal.com

Questions

What payment terms does 402Signal advertise?

The listing advertises x402, Base, Solana and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is 402Signal listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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