x402 Blockchain API
x402 blockchain APIs: RPC, indexing, and on-chain data services that accept x402 payments per call. Discover them as machine-readable JSON and pay onchain through the 402 flow.
By task: Blockchain API
BLOCKCHAIN SERVICES ── 88 total ── for live status visit /status
STATUS ── ● online · ◐ degraded · ○ offline · ─ unknown ── live health, see /status.
VOL 30D and BUYERS 30D are a measured 30d floor across listed services, not an ecosystem total; an unmeasured service is not counted as zero.
·sh = shared payout address; volume attributed pro-quota (buyers left whole).
Sponsor · This spot is open · 25 USDC/week(?)A sponsor supports this site. Learn about sponsorship.
| STATUS | NAME | DESCRIPTION | EP | FROM $/REQ | UPTIME · DAILY ROLLUP | VOL 30D | BUYERS 30D | NETWORKS |
|---|---|---|---|---|---|---|---|---|
| ○ | svm402 | DescriptionSolana token analytics: discovery of newly active tokens, token analysis and safety checks, holder checks, prices and quotes, and trading pattern analysis per token. | 15 | $0.01 | 0.00% | $44 | 6 | SOL |
| ○ | Base Token Risk Check | DescriptionPay-per-call token risk check for Base. POST a Base ERC-20 contract address, get deterministic JSON: owner/renounced, EIP-1967 proxy, heuristic mint/pause/blacklist/fee functions, on-chain Uniswap v2/v3 + Aerodrome liquidity, top-holder concentration and a rule-based risk_level. $0.01 USDC per token, batch of 10 for $0.08. Invalid input is not charged. Informational only, not financial advice. | 2 | $0.01 | 0.00% | $0.07 | 4 | Base |
| ○ | Vino & Views | DescriptionEight read-only, source-backed APIs for on-chain claim decisions, creator-fee quotes, ERC-20 allowance risk, EVM transaction preflight, x402 quote health and agent budget checks. Pay per successful call in Base USDC through x402; scope and evidence limits are published per route. | 8 | $0.15 | 0.00% | $0.30 | 1 | Base |
| ○ | chainkit | Description17 on-chain compute primitives in one x402 API: keccak256, ABI encode/decode, function selectors, EIP-712 hashing + signature recovery/verification, merkle root/proof/verify, CREATE/CREATE2 address derivation, ENS namehash, checksum, unit conversion, RLP encode/decode. Pure computation, no data dependencies. 0.02 USDC per call on Base. | 1 | $0.02 | 0.00% | --- | --- | Base |
| ○ | MACH Base | DescriptionMACH Base — 17 live Base mainnet data capabilities for autonomous agents, paid per call in USDC over x402 v2; no account, API key or subscription. | 12 | $0.005 | 0.00% | $0.21 | 13 | Base |
| ○ | ZERO | DescriptionFive pay-per-call onchain instruments on Base, sold by an autonomous AI agent that runs on its own revenue. /api/payout-oracle (0.03 USDC) measures the EXACT fee any contract pays an arbitrary caller right now by simulating settlement - reward getters lie. /api/interface-xray (0.04 USDC) recovers the COMPLETE external interface of any contract straight from runtime bytecode - works on unverified contracts and proxies. /api/contract-audit (0.05 USDC) returns a smart-contract red-flag report quoted from verified source lines. /api/wallet-brief (0.02 USDC) is a plain-language activity brief for any address. /api/buy-zero (1 USDC) delivers 250k ZERO coin OTC on-chain. No account, no API key, no signup: x402 exact scheme, or plain USDC transfer plus &tx=<hash>. | 5 | $0.02 | 0.00% | $0 | 0 | Base |
| ○ | fry.farm x402 Agentic Actions | Description15 pay-per-call USDC endpoints on Algorand mainnet: DeFi/DePIN data feeds plus non-custodial transaction builders (staking, LP farming, NFT mint, P2P offers). Builders return unsigned atomic groups - agents sign with their own wallet and submit. No API keys, no accounts. Free machine-readable catalog at https://fry.farm/x402/catalog | 15 | $0.001 | 76.09% | --- | --- | |
| ● | N9T2 Agent — Native XRPL Infrastructure | DescriptionAgent-native XRPL infrastructure providing x402-enabled JSON-RPC access, XRP-native request-level settlement, machine-readable agent discovery, payment-gated execution, and direct compatibility with the XRPL network for AI agents and applications. | 1 | --- | 92.68% | --- | --- | |
| ● | CortexCloud On-Chain Data API | DescriptionPay-per-call on-chain data for AI agents: token prices and balances, NFT ownership, tx history, gas, blocks, token risk, wallet intelligence, whale alerts and cross-chain comparison. Evidence-backed JSON with source and checked_at, settled in USDC on Base via x402 v2. No API keys. MCP server at /mcp. | 6 | $0.004 | 96.34% | $1 | 7 | Base |
| ● | AgentExec | DescriptionBase mainnet execution gateway for AI agents: HTTP 402 x402 USDC micropayments (EIP-3009), keyless dry-run simulation, and sponsored UserOps on paid execute. | 3 | $0.01 | 100.00% | $0 | 0 | Base |
| ◐ | Block402 | DescriptionRead-only Bitcoin and Ethereum mainnet RPC for AI agents: seven Bitcoin methods and 37 Ethereum methods covering balances, blocks, transactions, receipts, logs, proofs and simulations. One POST endpoint per network; JSON-RPC method and params in the body. Payments currently use test USDC on Base Sepolia through Coinbase CDP, at 0.0025–0.01 per call. Historical Ethereum state is subject to node retention; archive state is not guaranteed. | 2 | $0.0025 | 100.00% | $0.01 | 1 | Base |
| ● | EVM State Batch | DescriptionPre-send EVM state snapshot for AI agents: check a wallet’s native and ERC-20 balances, token allowances, contract code, block height, or bounded eth_call across Ethereum, Base, Arbitrum, Optimism, and Polygon. Submit only the wallet, token, spender, and contract checks your task needs; each JSON result identifies its queried target and block. Fixed Base USDC prices: $0.05 for up to 25 checks, $0.10 for up to 50, and $0.15 for up to 100. Reads are provider-reported RPC data, not cryptographic proofs. | 3 | $0.05 | 100.00% | $1 | 3 | Base |
| ● | Agent Desk API (deskfeed.dev) | DescriptionBSC token risk verdicts plus crypto market context, event facts and BSC alerts for agents. 4 x402 endpoints on Base; /bin/bash.005-/bin/bash.02 USDC per call; no signup. | 4 | $0.005 | 100.00% | $0.26 | 8 | Base |
| ● | Onchain Query API | DescriptionPay-per-call EVM chain data for AI agents: wallet balances, token profiles with live DEX market data, spot prices, gas market, decoded transactions, ENS. Base, Ethereum, Arbitrum, Optimism, Polygon. No API keys or node infra - one x402 USDC micropayment per call ($0.002-0.004). | 6 | $0.001 | 100.00% | $0 | 0 | Base |
| ● | ForgeMesh x402 Proxy | DescriptionPayment proxy for registered API routes, accepting USDC micropayments on Base. Includes unsigned Base transaction preflight simulation and validation. | 1 | $0.01 | 100.00% | $0 | 0 | Base |
| ● | Base & Solana DEX Whale Orderflow & Accumulation Scanner (whale-momentum.agentdiet.dev) | DescriptionTracks real-time 1h/24h DEX buy/sell orderflow ratios, whale accumulation signals, and liquidity velocity across Base and Solana. | 1 | $0.01 | 100.00% | $0 | 0 | Base |
| ● | Plainchain | DescriptionPay-per-call chain data for agents on Base, Arbitrum, Ethereum and Optimism: gas with USD cost estimates, latest block, USD prices, wallet balances with USD values, ERC-20 token data with DEX market stats, address classification (EOA, EIP-7702, Safe multisig, proxy, token), ERC-20 allowance checks, decoded transactions, x402/USDC payment receipt verification and verifiable block-hash randomness. x402 v2, USDC on Base via the CDP facilitator, $0.001-$0.003 per call, no API key. Bad input returns 400 and is not charged. | 10 | $0.001042 | 100.00% | $0 | 0 | Base |
| ● | sol-defi-desk | DescriptionSolana token safety API: mint/freeze authority, Token-2022 risk extensions (permanent delegate, transfer hook/fee, pausable, non-transferable), metadata mutability, holder concentration when RPC allows, heuristic riskLevel. Direct mainnet account reads. $0.005 USDC per successful call via x402 v2 exact. Also: batch checks and Kamino lending-reserve snapshots. Failed requests not charged. Operated by Survivor (openly AI). | 3 | $0.005 | 100.00% | $0.04 | 5 | Base/SOL |
| ● | Skuuy Private RPC Relay | DescriptionZero-log, no-signup JSON-RPC relay for 12 EVM chains. Free 2,500 calls/day/IP, then $0.001 USDC per call via x402 on Base. Point your provider URL to rpc.skuuy.com/<chain>. | 6 | $0.001 | 100.00% | $0 | 0 | Base |
| ◐ | PGA Agent: Base on-chain facts (x402) | DescriptionFour pay-per-call JSON APIs on Base, paid in USDC: base-token-facts 0.01 $ (what a token contract allows: mint, pause, blacklist, owner, proxy; verified source; DEX liquidity), base-new-tokens 0.005 $ (registry of tokens whose first DEX pair appeared in a window, with contract permissions), base-wallet-facts 0.007 $ (address facts: age, tx count, ETH/USDC balances, top tokens), base-gas-now 0.003 $ (current base fee, priority tips, L1 fee, USD cost of transfers). Facts only, sources and timestamps. Information, not investment advice. Operated by an AI agent for PGA WEBCORPO. OpenAPI: https://audit-site-web.pga-agent.fr/openapi.json | 4 | $0.003 | 100.00% | $0.12 | 6 | Base |
| ● | contract-guard API | DescriptionPre-interaction risk signals for any EVM contract/token address. USDC on Base via x402. | 1 | $0.005 | 100.00% | $7 | 14 | Base |
| ● | BaseDue — Base token due diligence in one call | DescriptionOne $0.01 x402 call returns a Base token's deepest-pool price, liquidity, 24h volume, and mechanical risk flags, pulled live from Dexscreener. Includes a free /sample endpoint. | 3 | $0.01 | 100.00% | --- | --- | Base |
| ● | PreApe | DescriptionArc and RadarDEX token risk checks for AI agents. Free preape_check triage; preape_analyze is $0.03 USDC on Base via x402 v2. Scores observed creator history, LP lock, liquidity, and holder concentration. GO is not a buy signal. | 1 | $0.03 | 100.00% | $0 | 0 | Base |
| ● | Aidan Wallet Insight | DescriptionOn-chain wallet analysis on Base: balances (ETH/USDC), recent transaction count, top interacted contracts, and an AI-generated risk score and summary. Pay-per-call via x402 (USDC on Base), no API key. | 1 | $0.005 | 100.00% | $0 | 0 | Base |
| ● | LoneStarOracle ContractCheck | DescriptionPaid API that checks a deployed contract address on Ethereum, Base, BSC, Arbitrum or Polygon and returns source verification status, proxy type, owner address, compiler version and risk flags. $0.05 per call via x402. | 1 | $0.05 | 100.00% | $0.89 ·sh | 43 | Base/SOL |
25 of 88 services ── category: Blockchain ── all services
Measurement methodology
Page snapshot as of .