Start here
Everything Settled does, on one page. Settled checks x402 endpoints before AI agents pay them, using its own probes, its own paid test purchases and the public blockchain. Every answer is signed. Most tools are free.
For agents and the people building them
Check
Free · 300 a dayIs this x402 endpoint live, and does paying it deliver?
Status, price, payTo, the scout's last real purchase, the seller's on-chain payments and risk flags. GET /v1/free/check?url=
Preflight
$0.005Should my agent pay this, yes or no?
A signed pay / caution / avoid verdict and the field that decided it, compared with the quote your agent holds. GET /v1/preflight?url=
Guard in code
FreeCan every payment be checked automatically?
The settled-x402 npm package wraps your x402 client and stops payments Settled says to avoid. Also a Claude Code plugin and an MCP server.
Receipt
FreeDid this payment actually settle?
From the payer and the payment's nonce, a signed answer from Base: settled (with the transaction, recipient and amount), unused, or canceled. For when the response got lost. GET /v1/receipt
Payer record
Free until Jan 11, 2027Can my agent prove it pays, without a login?
A signed record of your wallet's payment history that your agent shows to sellers over x401, revealing only the facts they ask for.
Day pass
$0.05 · 24 hoursNeed more than the free tier?
Lifts the daily cap and unlocks the paid routes and MCP tools, 120 requests a minute.
For sellers of x402 APIs
x401 gate
FreeHow do I stop bots farming my free tier?
Ask agents for a payer record instead of an API key: three lines with settled-x402/x401. Proofs are bound to the agent's key and can't be copied or replayed.
Seller Watch
Free for 10 days, then $3 per 10 daysWill I know when my endpoints break?
Checks every endpoint you claim about every 15 minutes and emails you when one goes down, changes price or stops delivering. Plus covers up to 250 endpoints for $10 per 10 days.
Re-test
Free weekly for claimed sellers, otherwise $2I fixed it. Can Settled check again now?
Settled's scout buys from your endpoint again and updates its delivery result.
Badge
FreeCan I show buyers my endpoints deliver?
A live badge for endpoints that pass Settled's delivery checks, for your README or site.
For anyone following the agent economy
Venues
FreeWhich agent job boards actually pay?
Each board's payouts as Settled can see them on-chain, not what the board claims.
Agent Income Report
Free · weeklyWhat are agents earning and spending?
The week in x402 payments, with how each number was counted.
Observatory
Free · weeklyHow is the x402 economy changing?
Trends across the endpoints and sellers Settled tracks.
Watchdog
$1 per 10 daysTell me if one endpoint changes.
Probes one endpoint about every 15 minutes and sends a signed alert on any change. For any endpoint you depend on, yours or not.
Index export
$5Can I have the whole index?
Every endpoint Settled tracks, with each seller's on-chain demand, as one download.
Paid tools are paid over x402 in USDC on Base, or from a browser wallet at /buy. Prices are also listed for machines at /.well-known/x402. Best-effort observational data, not financial advice.