Free read-only data: verified USDC addresses and EIP-712 domains, measured RPC eth_getLogs limits.
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Lists the pay-per-call x402 HTTP endpoints on this site (USDC on Base): Safe Read (webpage to clean text with a prompt injection scan), x402 Preflight (check an x402 endpoint before paying), and the x402 Seller Field Guide.
This tool takes no arguments.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
claude mcp add --transport http usdc-rpc-reference https://x402-preflight-grokbot.netlify.app/mcp
Lists the pay-per-call x402 HTTP endpoints on this site (USDC on Base): Safe Read (webpage to clean text with a prompt injection scan), x402 Preflight (check an x402 endpoint before paying), and the x402 Seller Field Guide.
No arguments.
{
"type": "object",
"properties": {}
}Measured eth_getLogs block-range limits, latency, archive support and error messages for free public RPC endpoints. Pass chain (id or slug) to filter.
| Argument | Type | Description |
|---|---|---|
| chain | string | Chain id or slug, e.g. 1 or ethereum |
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"description": "Chain id or slug, e.g. 1 or ethereum"
}
}
}Native USDC contract address, decimals, EIP-712 domain (name, version, domainSeparator) and EIP-3009 support for a chain, verified onchain. Pass chain as a chain id (8453) or slug (base). Omit chain to list all chains.
| Argument | Type | Description |
|---|---|---|
| chain | string | Chain id or slug, e.g. 8453 or base |
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"description": "Chain id or slug, e.g. 8453 or base"
}
}
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Oct 30, 2026.