Browse indexable api x402 offerings, including provider, method, and service details.
1566 indexable offerings in this category.
How much of an ERC-20 token a spender is approved to move from an owner's wallet, via allowance, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The approval read every DeFi, swap and trading agent makes before (and after) a transaction to know if an approve is needed. Live public RPC; one paid call.
Query raw event logs by contract address and/or indexed topics over a block range via eth_getLogs — the indexing primitive, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Filter by address, topic0 (the event signature) and topic1-3, get back address, topics, data, block number, transaction hash and log index. Ranges are capped at 500 blocks and 200 logs so the call always answers instead of being rejected by a public node, and BOTH caps are reported explicitly in the response (trun
Total supply, holder count, decimals, and live USD price / market cap for any ERC-20/721 token contract, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The supply read trading, valuation, and risk agents make to size circulating supply, dilution, and holder distribution before pricing or trading a token. Free upstream (Blockscout); one paid call instead of running your own RPC.
Any wallet's balance of any ERC-20 token (USDC, USDT, DAI, or any contract) via balanceOf, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The token-balance read wallet-tracking, copy-trade, treasury and trading agents poll constantly — the most-called RPC read after native balance. Live public RPC; 6 chains vs onesource's Ethereum-only coverage.
Simulate any read-only Ethereum contract call via eth_call — pass a contract address and encoded calldata, get the raw return value, across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The universal contract-read primitive for agents that need a view function not covered by a dedicated endpoint. Live public RPC; one paid call.
Live network gas prices (slow / average / fast, in gwei) for any chain — the pre-transaction read every trading, sniping, and settlement agent makes before sending a tx to size the fee. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free upstream (Blockscout); one paid call instead of running your own RPC.
The core on-chain RPC read: any address's native coin balance (ETH/POL/xDAI) with live USD value and outgoing transaction count (nonce), across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. The high-frequency balance check wallet-tracking, settlement, and trading agents poll constantly. Free upstream (Blockscout); 6 chains vs onesource's Ethereum-only.
Read any raw contract storage slot via eth_getStorageAt — the low-level read auditing, proxy-resolution and advanced trading agents make to inspect contract state directly. Pass address + slot. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; 6 chains vs onesource's Ethereum-only coverage.
Current top DeFi yield opportunities filtered by chain and minimum TVL. Returns pool, project, chain, APY (base + reward), TVL, and stablecoin flag, sorted by APY. Sourced live from DefiLlama with attribution. For agents scanning yield opportunities.
Which side of the perp market is over-leveraged right now, and how exposed it is — not a raw feed. Composes Hyperliquid funding, premium and open interest with OKX open interest and the long/short account ratio into a named regime (LONG_SQUEEZE_RISK / SHORT_SQUEEZE_RISK / BALANCED), a 0-100 pressure score, and the evidence behind it. The pre-position read for a leveraged agent. Free public upstreams, no exchange key.
Provides paid HTTP GET access to the project's roadmap, returning a title and an array of roadmap items.
Prepaid credit of $0.10 for paid API calls without signing each request. On Rota Nacional it pays for the AI API without an account or key: chat with models compatible with OpenAI and Anthropic clients, embeddings, transcription, speech, OCR, image generation and personal-data cleaning, priced per use in Brazilian reais. The same token pays the paid APIs of our other products.
Describe a task (or name a slug) and the Smart Order Router resolves the best-matching tool and RUNS it in the same call - flat $0.55 covering any tool listed at $0.5 or less, from THIS host's catalog or any external seller in the open index - x402 sellers, or MPP sellers on Tempo (Agent402 buys the result over x402 or MPP and sells it to you). One payment, one request, result + receipt.
Describe a task (or name a slug) and the Smart Order Router resolves the best-matching tool and RUNS it in the same call - flat $0.05 covering any tool listed at $0.04 or less, from THIS host's catalog or any external seller in the open index - x402 sellers, or MPP sellers on Tempo (Agent402 buys the result over x402 or MPP and sells it to you). One payment, one request, result + receipt.
Search x402 service registry — broad q search plus health, score, category, tag, and tags filters
Parse an RSS or Atom feed into structured items (title, link, date, summary). Use to list the latest posts from a blog or news feed.
Prepaid credit of $0.10 for paid API calls without signing each request. On samehand it pays for rewrites of your short drafts in your own voice at $0.02 each after 5 free a day. The same token pays …
Agent Capability Registry and Discovery. A versioned capability registry that lets a client discover what an agent can do, determine what it may do, validate schemas, estimate cost, and reject stale or unsafe tool definitions before invocation.
Search 19+ platforms in a single API call: Reddit, Hacker News, GitHub, Stack Overflow, arXiv, npm, PyPI, X/Twitter, YouTube, Product Hunt, Dev.to, Qiita, Zenn, Semantic Scholar, GitLab, Hashnode, Lobsters, Lemmy, and x402 Bazaar. Includes Deep Research with AI synthesis. Accepts USDC payments on Base and Solana via x402 protocol.
Open for Business, the weekly issue for sellers: what agents did at a live x402 till and at the doors the store probes, and how not to turn them away silently. One issue, as markdown, $25.
The Hosted Profile. REQUIRES ?url= on the paid request — a signed request without it is refused before the gate and no money moves. A standing page about your endpoint at this store's domain for 30 days per purchase, renewable: your live endpoint passport, the freshness chip, and the signed per-host observation history, aggregated at one URL an operator can hand to anyone. The commission record is signed and its evidence hash bound into your purchase certificate. Never a ver…
Price: $0.005 in USDC on Base. Ranked list of live x402 endpoints (top 50) filtered by keyword, network and max price, ordered by Settled quality score. Use it to find a working alternative to a dead or overpriced endpoint.
Buy a 24-hour day pass: one payment unlocks preflight, check, endpoints, payto, income and income/check, and every MCP tool, for 24h at up to 120 requests/min (the Watchdog, Seller Watch and the sell…
Use as a low-cost end-to-end x402 canary before higher-value calls. A successful paid response proves Sharvora delivery and returns release, network, time and a response receipt.