rest.coincap.io/v3/agentFriendly/history/bitcoin

Historical price series for an asset slug (capped data points).

Endpoint	`https://rest.coincap.io/v3/agentFriendly/history/bitcoin`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x9baa4417D1E78F2eD5b09aa4Abfb541aeB2cD6Ed
method	GET
last updated	2026-10-24T14:57:40.714Z

Use it

Call it (an x402 client pays automatically)

curl -i https://rest.coincap.io/v3/agentFriendly/history/bitcoin
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-4e0de1713ce92d31

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}