x402 Seller Check
402.com.tr · 99 paid endpoints · listed 2026-10-27
An executable swap on Base, routed by 0x across Uniswap, Aerodrome, Balancer, Curve and more. Returns the transaction for your own wallet to sign, plus the approval step if needed, minimum out, route and fees. We never hold funds. Name tokens as ETH, USDC, WETH, cbBTC, AERO… or a 0x address; buying an unknown token runs a sellability check first and refuses a honeypot unless force=1.
livelast check 5 days ago
100%valid x402 answers, 72 h
$3.18USDC received on Base, 7 days
18distinct payers, 7 days
63.2score (0-100)
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | 402.com.tr/api/x402/base-block 🆕 One block on Base — height, hash, parent, timestamp and age in seconds, transaction count, gas used against the limit, and the base fee in gwei. Takes a bloc | $0.002 | Base |
| GET | 402.com.tr/api/x402/base-nonce 🆕 The next nonce for any Base address, plus its ETH balance and whether it is a contract. The count means different things either side of that line — transacti | $0.002 | Base |
| GET | 402.com.tr/api/x402/base-receipt 🆕 The receipt for a Base transaction: success or reverted, block, gas used, effective gas price, the fee in wei and ETH, how many logs it emitted and which con | $0.002 | Base |
| GET | 402.com.tr/api/x402/base-tx 🆕 A Base transaction by hash, unedited: from, to, value in wei and ETH, nonce, gas, fee caps, type, and the 4-byte method selector with the calldata size. Flag | $0.002 | Base |
| GET | 402.com.tr/api/x402/contract-info 🆕 What sits at a Base address: contract or plain wallet, and if a contract, whether it declares ERC-721 or ERC-1155 via ERC-165 or carries the ERC-20 shape, pl | $0.002 | Base |
| GET | 402.com.tr/api/x402/iban-check Validate an IBAN offline: country registry length, structure, and the ISO 7064 mod-97 checksum that catches what humans and spreadsheets actually get wrong — a | $0.002 | Base |
| GET | 402.com.tr/api/x402/token-balance 🆕 An ERC-20 balance on Base, in raw units and in decimals, with the token's symbol and decimals resolved in the same call. Zero is flagged explicitly, since it | $0.002 | Base |
| GET | 402.com.tr/api/x402/token-supply 🆕 totalSupply for any Base token, returned raw and scaled by its decimals, alongside the name and symbol. When a contract doesn't declare decimals the answer a | $0.002 | Base |
| GET | 402.com.tr/api/x402/address-label What is this Base address? Matches a sourced registry of known protocol, exchange, bridge, locker and burn addresses (each with the docs/deployments/Basescan so | $0.005 | Base |
| GET | 402.com.tr/api/x402/agent-pay-gate A pre-payment gate for an agent about to send USDC. Screens the recipient (OFAC sanctions, Coinbase/Basename identity, wallet vs contract, fresh-address age) an | $0.01 | Base |
| GET | 402.com.tr/api/x402/b20-launch-radar 🆕 Lists the newest B20 tokens created on Base (from the B20Factory precompile) — variant, symbol, decimals, block. B20 is Base's native token standard and doze | $0.01 | Base |
| GET | 402.com.tr/api/x402/bank-csv Parse a bank CSV (comma/semicolon/tab, quoted fields) and map common headers (date/amount/debit/credit/balance/description, TR aliases) into one schema. Up to 5 | $0.01 | Base |
| GET | 402.com.tr/api/x402/base-swap An executable swap on Base, routed by 0x across Uniswap, Aerodrome, Balancer, Curve and more. Returns the transaction for your own wallet to sign, plus the appr | $0.01 | Base |
| GET | 402.com.tr/api/x402/basename Forward + reverse Basename resolution read from the Base L2 Resolver: turn jesse.base.eth into an address, or an address into its primary Basename. No API key r | $0.01 | Base |
| GET | 402.com.tr/api/x402/bridge-status The other half of bridge-route. A bridge takes minutes with funds in flight, and from the source chain alone an agent cannot tell if it completed. Tracks a tran | $0.01 | Base |
| GET | 402.com.tr/api/x402/chain-status Live Base chain snapshot: latest block, base fee + priority fee (Gwei), current ETH price, and the estimated USD cost of a simple ETH transfer. For agents timin | $0.01 | Base |
| GET | 402.com.tr/api/x402/decode-selector Resolves a 4-byte function selector (e.g. 0x70a08231) to candidate human-readable signatures via 4byte.directory. Accepts a bare selector or full calldata. | $0.01 | Base |
| GET | 402.com.tr/api/x402/encode-selector Computes the 4-byte selector for a function signature (e.g. transfer(address,uint256) → 0xa9059cbb). The inverse of the decoder — useful for agents building or | $0.01 | Base |
| GET | 402.com.tr/api/x402/ens-resolve Forward + reverse ENS resolution on Ethereum mainnet: turn vitalik.eth into an address, or an address into its primary ENS name. Complements the Basename resolv | $0.01 | Base |
| GET | 402.com.tr/api/x402/gas-oracle Returns current Base gas fees (baseFee, maxPriorityFee) and three tiered suggestions (slow, normal, fast) in Gwei, derived live from the Base RPC. Built for age | $0.01 | Base |
| GET | 402.com.tr/api/x402/near-account Before an agent pays or trusts a NEAR account: does it exist, what kind is it (named, implicit, 0x), how much NEAR it holds (available, staked, locked for stora | $0.01 | Base |
| GET | 402.com.tr/api/x402/near-swap An executable NEAR Intents swap: a binding quote with a deposit address. Send amountIn of the origin asset there before the deadline; the output goes to recipie | $0.01 | Base |
| GET | 402.com.tr/api/x402/near-swap-quote An indicative quote for swapping any asset NEAR Intents routes — NEAR, USDC, USDT, BTC, SOL and more, across chains. Name assets as a symbol (USDC = on NEAR, US | $0.01 | Base |
| GET | 402.com.tr/api/x402/new-tokens Returns the latest tokens profiled on Base from the DexScreener feed — address, description, and links. Great for discovery bots hunting new launches early. | $0.01 | Base |
| GET | 402.com.tr/api/x402/receipt-parse Heuristic extraction from invoice/receipt text: totals, amounts, VAT hints, IBANs, dates, emails, invoice numbers. Not OCR — convert a scan to text first, then | $0.01 | Base |
| GET | 402.com.tr/api/x402/secure-token Generate N cryptographically-strong, url-safe random tokens server-side — session IDs, API nonces, one-time codes, coupon secrets. Pass count= for how many. A t | $0.01 | Base |
| GET | 402.com.tr/api/x402/token-age When was this token born — its earliest transfer on Base — and how old is it in days, with a verdict: brand_new (<1d), very_new (<7d, where most rugs happen), n | $0.01 | Base |
| GET | 402.com.tr/api/x402/token-info Metadata for a Base token: name, symbol, logo image, official website and social links (X/Telegram/etc.) plus price & liquidity — from DexScreener. For agents a | $0.01 | Base |
| GET | 402.com.tr/api/x402/trending-tokens Use when an agent hunts what is moving on Base. Up to 15 trending Base pools ranked by live DEX activity (GeckoTerminal): token address, pool, DEX, price, 24h c | $0.01 | Base |
| GET | 402.com.tr/api/x402/address-intel EOA vs contract, ETH + USDC balance, transaction count and activity level — straight from Base RPC. Useful for counterparty and wallet checks. | $0.02 | Base |
| GET | 402.com.tr/api/x402/basename-profile 🆕 Resolves the complete Base identity behind an address or Basename: resolved address, avatar, description, website and social handles (X/Twitter, GitHub, Farc | $0.02 | Base |
| GET | 402.com.tr/api/x402/contract-abi Checks Sourcify for a Base contract's verification status and returns its ABI as function/event name lists + item count (full or partial match). No API key requ | $0.02 | Base |
| GET | 402.com.tr/api/x402/holders Top-10 holders with their %, holder count, concentration level (whale risk), and LP-lock %, from GoPlus. Lets agents judge how fairly a token is distributed bef | $0.02 | Base |
| GET | 402.com.tr/api/x402/lp-lock Surfaces the LP holders, how much of the LP supply is locked or burned vs pullable, the lockers, and unlock dates. Unlocked liquidity is the clearest rug setup | $0.02 | Base |
| GET | 402.com.tr/api/x402/multi-price Pass a comma-separated list of up to 10 Base token addresses and get USD price + 24h change for each in one call. Ideal for agents pricing a portfolio or watchl | $0.02 | Base |
| GET | 402.com.tr/api/x402/sanctions Use before an agent pays, receives from or onboards a wallet: an OFAC sanctions / AML screen of the address against the US Treasury SDN list of sanctioned digit | $0.02 | Base |
| GET | 402.com.tr/api/x402/stock-fair-value Tokenized stocks trade 24/7 on Base; their reference price (Chainlink, used by Aave and Morpho) freezes when the US market shuts. One call: the US session, the | $0.02 | Base |
| GET | 402.com.tr/api/x402/token-approvals Lists a wallet's active token approvals — which contracts can spend its tokens, the allowance, USD value at risk and a risk factor (revoke.cash-style). Essentia | $0.02 | Base |
| GET | 402.com.tr/api/x402/token-price Pass a Base token contract address and get the current USD price, 24h change, liquidity, and volume from DexScreener (highest-liquidity pair auto-selected). No | $0.02 | Base |
| GET | 402.com.tr/api/x402/token-unlock Turns raw LP-lock data into a forward calendar: each unlock with its date, the % of LP it frees, the locker (UNCX / Team Finance labelled), and days away — flag | $0.02 | Base |
| GET | 402.com.tr/api/x402/tx-decode Provide a Base transaction hash and get a structured summary: from/to, ETH value, status, gas used, block, method selector, and nonce — straight from Base RPC. | $0.02 | Base |
| GET | 402.com.tr/api/x402/wallet-networth Complete token portfolio for a Base address with USD values: every ERC-20 the wallet holds, priced from live DEX liquidity, plus native ETH — sorted by value wi | $0.02 | Base |
| GET | 402.com.tr/api/x402/wallet-nfts Lists the NFT collections a Base wallet holds — name, count and floor value — spam-filtered, via Covalent. For agents profiling a wallet's NFT exposure. | $0.02 | Base |
| GET | 402.com.tr/api/x402/wallet-portfolio Complete ERC-20 portfolio for a Base address — every non-zero token with balance, metadata and live USD value, plus a total. Token discovery via CDP Data API (C | $0.02 | Base |
| GET | 402.com.tr/api/x402/activity-trend Not price momentum — ADOPTION. token-age tells you when a token was born; holder-distribution is a snapshot. Neither shows the TRAJECTORY. A token can pass ever | $0.03 | Base |
| GET | 402.com.tr/api/x402/address-poisoning The address-poisoning attack: a scammer sends dust from an address whose first/last characters match one you really use, hoping you copy-paste the poisoned one. | $0.03 | Base |
| GET | 402.com.tr/api/x402/address-trust 🆕 The 'who am I dealing with?' check for agents. Reads Coinbase's ONCHAIN verification (an EAS attestation by verifications.coinbase.eth) — meaning the address | $0.03 | Base |
| GET | 402.com.tr/api/x402/agent-reputation The payer-trust mirror of x402-seller-check. Reads a wallet's outgoing USDC payments on Base over 90 days: distinct sellers paid (breadth), total payments and U | $0.03 | Base |
| GET | 402.com.tr/api/x402/clanker-token-audit Reads the deployment records of Clanker's own factories on Base (v4 tokenDeploymentInfo, v3.1/v3/v2 deploymentInfoForToken; v0/v1 via the factory's TokenCreated | $0.03 | Base |
| GET | 402.com.tr/api/x402/compliance-check Combined counterparty screening for an address: direct OFAC sanctions match, EOA/contract profile, and (for contracts) risk flags — rolled into a single recomme | $0.03 | Base |
| GET | 402.com.tr/api/x402/contract-owner Reads who controls a contract straight from chain: owner/getOwner/admin, pending owner, EIP-1967 proxy implementation + admin, and paused state — and whether th | $0.03 | Base |
| GET | 402.com.tr/api/x402/corporate-actions Dividends and splits on a tokenized stock settle by moving its multiplier; balanceOf never changes, so a naive reader is silently wrong. Coinbase announces each | $0.03 | Base |
| GET | 402.com.tr/api/x402/holder-forensics Goes past 'top-10 = X%' to classify the holder base: how much the creator & owner still hold, which top holders are infrastructure (LP/CEX/bridge — benign) vs u | $0.03 | Base |
| GET | 402.com.tr/api/x402/owner-powers A token can look clean now — low tax, no honeypot, sells fine — and still leave the owner holding the switches to trap you later. sellability asks 'can I sell t | $0.03 | Base |
| GET | 402.com.tr/api/x402/price-impact A quote shows today's price; it does NOT tell you a $5k buy into a $20k pool pays ~20% more. This takes the token's deepest Base pool, treats it as constant-pro | $0.03 | Base |
| GET | 402.com.tr/api/x402/proxy-check Reads the EIP-1967 proxy slots live: is the contract upgradeable, what's the current implementation, and WHO can upgrade it. Flags the dangerous case — an EOA a | $0.03 | Base |
| GET | 402.com.tr/api/x402/rug-score Use when a trading agent wants one number for "will this Base token rug?": a deterministic 0-100 rug-pull probability from security flags (honeypot, tax, owner | $0.03 | Base |
| GET | 402.com.tr/api/x402/rwa-dividend-feed Every dividend or split applied to a Coinbase tokenized stock on Base, with multiplier before/after and the share accrual, joined to Coinbase's own record; thos | $0.03 | Base |
| GET | 402.com.tr/api/x402/safe-to-send Before your agent sends, approves or signs to an address — a wallet risk check with one GO/REVIEW/STOP verdict. Screens OFAC sanctions, Coinbase/Basename identi | $0.03 | Base |
| GET | 402.com.tr/api/x402/sanctions-batch Pass a comma-separated list of up to 25 addresses and get an OFAC sanctions result for each, plus the flagged subset. Built for compliance agents vetting whole | $0.03 | Base |
| GET | 402.com.tr/api/x402/supply-inflation owner-powers says the owner CAN mint; this says whether they ARE, and how fast. A token can advertise fixed supply and quietly inflate it, diluting holders befo | $0.03 | Base |
| GET | 402.com.tr/api/x402/token-risk Use when an agent asks "is this Base token safe?" before buying, holding or listing it. One scam/rug check read live from Base RPC + GoPlus: honeypot, buy/sell | $0.03 | Base |
| GET | 402.com.tr/api/x402/token-transfers Recent transfers of a specific token for a wallet — direction (in/out), amount, USD value, counterparty, tx hash and time, via Covalent. For agents tracking tok | $0.03 | Base |
| GET | 402.com.tr/api/x402/tokenized-stock-price b20-safety says a tokenized stock is a real issuance; this says what it trades at ON-CHAIN and whether there's liquidity for size. Pass symbol=AAPL (or AAPLc) f | $0.03 | Base |
| GET | 402.com.tr/api/x402/wallet-activity The latest transactions for a Base address — hash, time, from/to, ETH value, success — via Covalent. For agents tracking what a wallet is doing. | $0.03 | Base |
| GET | 402.com.tr/api/x402/wallet-delegation 🆕 Since Pectra an EOA can carry EIP-7702 delegated code (the 0xef0100 designator): every call to the wallet executes the DELEGATE's contract with the wallet's | $0.03 | Base |
| GET | 402.com.tr/api/x402/wallet-summary Wallet age in days, first & last activity timestamps, and outgoing transaction count for any Base address — read straight from the Base archive, not a 30-day fe | $0.03 | Base |
| GET | 402.com.tr/api/x402/b20-metadata 🆕 A B20 with a METADATA_ROLE holder can call updateName/updateSymbol — change its own identity after launch (an impersonation / bait-and-switch vector ERC-20 h | $0.04 | Base |
| GET | 402.com.tr/api/x402/b20-safety 🆕 Live — B20 is Base's native precompile token standard, and unlike ERC-20 a B20 issuer can freeze holders (Policy Registry) and even SEIZE your balance (burnB | $0.04 | Base |
| GET | 402.com.tr/api/x402/base-withdrawal 🆕 Beryl (2026-06-25) cut the single-proof withdrawal window from 7 days to 5, with a dual-proof fast path at ~1 day. Given a Base withdrawal-initiation tx, thi | $0.04 | Base |
| GET | 402.com.tr/api/x402/commerce-escrow 🆕 First tooling for Base's Commerce Payments protocol (AuthCaptureEscrow): reconciles two-phase auth/capture payments — in escrow, captured, charged, voided, r | $0.04 | Base |
| GET | 402.com.tr/api/x402/contract-danger Reads a verified contract's ABI and flags owner-callable abuse functions: mint (dilute), pause (freeze exit), blacklist (block your wallet), setFee/setTax (tax | $0.04 | Base |
| GET | 402.com.tr/api/x402/deployer-rep Profiles the token's creator wallet: how much history it has, how much of the supply the creator still holds, and whether ownership is renounced — rolled into a | $0.04 | Base |
| GET | 402.com.tr/api/x402/dump-risk "Top holder owns 18%" means nothing without: 18% of what, against how deep a pool. Values the largest live holders' bags (GoPlus % × Base supply × price; pools, | $0.04 | Base |
| GET | 402.com.tr/api/x402/first-funder 🆕 Funding provenance in one call. Traces a Base wallet back to its EARLIEST transaction and resolves who first funded it: a recognized exchange/bridge (real on | $0.04 | Base |
| GET | 402.com.tr/api/x402/know-your-agent x402 proves payment; this answers whether the wallet should be recognised. Resolves a wallet's onchain identity — Coinbase verification (a KYC'd attestation), B | $0.04 | Base |
| GET | 402.com.tr/api/x402/mev-guard Agents are the easiest MEV prey: predictable, public-mempool, a measured ~$50M/quarter tax. A sandwich only pays when a trade moves the pool enough to front-run | $0.04 | Base |
| GET | 402.com.tr/api/x402/stock-collateral-risk Aave V4 and Morpho on Base lend USDC against tokenized stocks (AAPLc, NVDAc, TSLAc…), priced by a 24/5 oracle that freezes from Friday 20:00 to Sunday 20:00 ET | $0.04 | Base |
| GET | 402.com.tr/api/x402/whale-flow Flow, not snapshot: the largest transfers of a Base token in the last 24h, classified by whether whales are sending INTO DEX pools (sell pressure) or pulling OU | $0.04 | Base |
| GET | 402.com.tr/api/x402/x402-seller-check x402 proves payment, not trust: an agent handed a URL pays blind, and the payee may be a real service or a burner that takes the USDC and vanishes. Give a url a | $0.04 | Base |
| GET | 402.com.tr/api/x402/approval-advisor Ranks a wallet's active token approvals by USD-at-risk x unlimited-allowance x unlabelled-spender, and returns a prioritised revoke queue. Approvals are the #1 | $0.05 | Base |
| GET | 402.com.tr/api/x402/b20-control 🆕 b20-safety tells you WHICH powers a B20 has; this tells you WHO holds them. Reads the token's role-based access control (mint / burn / seize-via-burnBlocked | $0.05 | Base |
| GET | 402.com.tr/api/x402/commerce-operator-audit 🆕 Commerce Payments flows are DRIVEN by an operator — it authorizes escrow, captures for merchants and takes the fees. This audits one before you rely on it: 9 | $0.05 | Base |
| GET | 402.com.tr/api/x402/holder-overlap Do two tokens share the same recent holders — the farm / sybil / coordinated-launch signal nobody else surfaces? Reads each token's recent recipients and return | $0.05 | Base |
| GET | 402.com.tr/api/x402/launch-snipers Reads a token's EARLIEST transfers to judge how it was launched: many recipients in a single early block or a tight block span is a sniped/bundled launch (coord | $0.05 | Base |
| GET | 402.com.tr/api/x402/sanctioned-exposure Not 'is this address sanctioned' (that's sanctions) but 'has it DEALT with one' — screens a wallet's USDC counterparties (both directions) against the OFAC SDN | $0.05 | Base |
| GET | 402.com.tr/api/x402/spend-audit 🆕 Base Account spend permissions let an app or agent spend a scoped, recurring allowance from a wallet — the primitive behind autonomous agent payments on Base | $0.05 | Base |
| GET | 402.com.tr/api/x402/token-compare Agents choose between tokens, not around them. Pass 2-5 Base token addresses → each gets a 0-100 quality score (safety-weighted: rug score first, then liquidity | $0.05 | Base |
| GET | 402.com.tr/api/x402/agent-wallet-audit 🆕 The complete fund-movement authority on a Base wallet in one call: ERC-20 approvals (a spender you approved can pull the token) PLUS Base Account spend permi | $0.06 | Base |
| GET | 402.com.tr/api/x402/sign-guard The check before the riskiest moment — signing. Decodes raw unsigned calldata (approve / permit / transfer / setApprovalForAll), shows the exact intent (who get | $0.06 | Base |
| GET | 402.com.tr/api/x402/wallet-drain-watch One GO/REVIEW/STOP across every drain vector: EIP-7702 delegation (a hostile delegate is total takeover), Base Account spend permissions (unbounded, non-expirin | $0.06 | Base |
| GET | 402.com.tr/api/x402/watchlist-diff Retention in one call: pass up to 10 tokens to snapshot them and get a watchId; call again with that watchId to get only the DELTAS since last time — liquidity | $0.06 | Base |
| GET | 402.com.tr/api/x402/batch-risk Screen up to 10 Base tokens in a single paid call — each gets a 0-100 rug-probability score, risk level and top signals, sorted riskiest-first. Built for agents | $0.08 | Base |
| GET | 402.com.tr/api/x402/sellability Use when an agent must know it can SELL a Base token before it buys: the honeypot check, answered three ways. Security simulation (honeypot, cannot-sell-all, se | $0.08 | Base |
| GET | 402.com.tr/api/x402/b20-gate 🆕 The single call before trading a Base-native B20: seize (burnBlocked) + freeze (Policy Registry) + rebase + pause + uncapped-mint, collapsed into one GO/HOLD | $0.10 | Base |
| GET | 402.com.tr/api/x402/fund-trace first-funder goes one hop; this walks the funding chain back up to 8 hops to a recognisable origin (a CEX/bridge on-ramp — lower-risk provenance) OR a SANCTIONE | $0.10 | Base |
| GET | 402.com.tr/api/x402/pre-trade-gate Use before an agent buys or swaps into a Base token: token-risk, sellability (honeypot, tax), swap route and price impact for your size, and deployer reputation | $0.10 | Base |
| GET | 402.com.tr/api/x402/portfolio-scan Pulls a wallet's holdings and runs a risk check on each, flagging which positions are honeypots / high-risk / illiquid and the USD sitting in risky tokens. One | $0.15 | Base |
| GET | 402.com.tr/api/x402/pre-trade-bundle Runs pre-trade-gate (risk, sellability, route, deployer), b20-gate (seize/freeze/pause; N/A for non-B20 tokens), owner-powers and dump-risk in parallel on a Bas | $0.15 | Base |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 5 days ago | 402.com.tr/api/x402/activity-trend | 402 | 870 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-11-01 | 22 | $0.632 | |
| 2026-10-31 | 7 | $0.014 | |
| 2026-10-30 | 39 | $0.549 | |
| 2026-10-28 | 6 | $0.124 | |
| 2026-10-27 | 24 | $0.552 | |
| 2026-10-26 | 10 | $0.60 | |
| 2026-10-25 | 20 | $0.704 |
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x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/402.com.tr