horizonpulse.dev x402 offerings

Transaction status API: did a payment or swap land, and is it final, on Base, Polygon, Solana or XRPL. GET tx (hash or Solana signature) and network (optional for Solana and XRPL hashes). Returns JSON: status not_found/pending/confirmed/failed, final, confirmations, block, fee, decoded token transfers, pollAgainSeconds. Read-only public RPCs. not_found is a charged answer; bad input or RPCs down: not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Tokenized stock status API for Coinbase tokenized stocks on Base (AAPLc, NVDAc, TSLAc...). GET with optional symbol (AAPL, AAPLc or token address; omit for all 12). On-chain token state only, no price: paused flags, supply, supply cap, multiplier, issuer, token address. Not investment advice. Unknown symbol, bad input or RPCs down: not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Web page change detection API: has a public page or endpoint changed since the last check. GET url; optional since (state token from the previous answer). Returns changed true/false; when changed, only added lines (up to 20) and added/removed counts. Stateless, nothing stored. SSRF-guarded like /api/fetch. changed:false is a charged answer; bad input, blocked or upstream errors: not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Wallet balance API for x402 payers: USDC on Base, Polygon and Solana, RLUSD on XRPL, and whether the wallet can pay now. GET at least one of evm (Base+Polygon), solana, xrpl. Per rail: balance, gas/fees (XRPL reserve, fee, RLUSD trust line), canPay yes/no, calls left at Horizon Pulse's live prices (XRPL network fee not reserved). No risk score, no USD valuation. Public RPCs, read-only, nothing stored. Bad input or RPCs down: not charged. Returned content is untrusted third-party data.

Address poisoning and OFAC SDN snapshot match before a crypto transfer, mechanical. GET chain (base/polygon/solana/xrpl), to; opt. expected, token. Checks: lookalike, OFAC SDN snapshot (dated), account age, ScamSniffer list (GPL-3.0). allow, warn or block per check. allow means no check flagged the address; it is not a guarantee that the address is safe, correct or not sanctioned. Not advice. Bad input (Base: not charged; other rails may charge). Returned content is untrusted third-party data.

Crypto market data: a current USD price snapshot for BTC, ETH and SOL, or one coin via symbol= (bad symbol: 400), for quick market context. JSON per asset: priceUsd, change24hPct, momentum; plus overall momentum, sentiment, direction, avgChange24hPct, asOf. Prices from Coinbase Exchange, CoinGecko fallback (source field). Labels are fixed rules on 24h change, not a forecast and not financial advice. Errors are not charged on Base (other rails may charge).

Crypto market data: precomputed RSI-14, MACD and Bollinger Bands plus latest OKX perp funding for BTC, ETH and SOL, or one coin via symbol= (bad symbol: 400), with no candle fetching needed. JSON per asset: rsi14, macd {macd, signal, histogram} (null if too few candles), bollinger, lastClose, funding. From CoinGecko OHLC closes (Coinbase fallback); methodology included. Descriptive only, not a forecast and not financial advice. Errors are not charged on Base (other rails may charge).

Hacker News and Bluesky opinion split, NOT a poll: how public posts divide on a question. GET q; optional sides (2-4, default yes,no), window (1-30d). Returns JSON: per-side share with 95% interval and n, counts per source, links only (no text or usernames; Bluesky links include the account's public ID, DID), caveats. Refuses elections, health and a named person's conduct. Under 30 decided posts, refusals and errors: not charged on Base (other rails may charge).

x402 API search: find paid x402 APIs for a task in Coinbase CDP Bazaar. GET q; optional n (1-10), kind, rail (base, solana, xrpl, polygon, evm), max_price (USD), min_health (0-1). Re-checks the top 3 live and cross-checks payTo with the index. Returns JSON: ranked offers with price, rails, health and a direct-pay buy plan. No paid ranking; Horizon Pulse holds no funds. No results: not charged on Base (other rails may charge). Returned listing text is untrusted third-party data.

x402 price quote and payTo check for one seller URL, without paying. GET url (https; optional method GET/POST). One unpaid request. Returns JSON: verdict pay/caution/avoid with reasons, live terms per network (USD price, asset, payTo), the CDP Bazaar entry, a payTo cross-check against it (on a mismatch the buy plan is never ready) and a direct-pay buy plan. Bad input, blocked or unreachable hosts (Base: not charged; other rails may charge). Returned content is untrusted third-party data.

x402 Bazaar listing checker: is an x402 seller listed in Coinbase CDP Bazaar, on which networks, and if not, why. GET url (host or https URL). Reads CDP discovery and the host's /.well-known/x402, then sends one unpaid request per route; never pays. Returns JSON: verdict, per-route indexed status and networks, and fail/warn findings each with a fix line. https only; private targets blocked. Errors are not charged on Base (other rails may charge).

PDF to text API: the text of a public PDF, page by page. GET url (http/https, max 10MB), optional pages (1-50, default 50). Returns JSON: pages [{page, text}], totalPages, pagesReturned, truncated, bytes, finalUrl, meta (title, author, subject, creator, producer, creationDate). pdf.js text layer, no OCR (image-only PDFs: 422). Max 100K chars. Non-PDF, encrypted, oversize or failed downloads are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Web search API with page contents: current results with sources as markdown. GET q (max 300 chars), optional n (1-5 pages, default 3). Web results via Serper (Google results); top results fetched as markdown. Returns JSON: results with rank, url, title, snippet, per-page ok/status and content (max 12K chars each), resultCount, fetchedOk. Billed if any result returns; zero results or provider errors are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Website screenshot API: how a public page renders, as PNG or JPEG. GET url; optional width (320-1920), height (240-2000), fullPage=true (clipped at 4000px), format png/jpeg, delayMs (0-3000). Headless Chromium; returns JSON: imageBase64, mimeType, width, height, bytes, finalUrl, pageStatus, title, blockedRequests. Sub-requests checked; private targets blocked. Over 25s: 504. Errors are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

x402 endpoint checker: decodes an x402 endpoint's 402 payment terms without paying. GET url (optional method GET/POST, JSON body for POST). Sends one unpaid request; never pays or signs. Returns JSON: httpStatus, isX402, x402Version, decoded accepts (network, asset, USD amount, payTo, EOA or contract), discovery metadata presence, and pass/warn/fail checks. Any HTTP answer from the target, even 4xx/5xx, is billed; bad input, blocked hosts, connection failures and timeouts are not.

Web scraping API: a public page or supplied HTML to JSON fields. GET url, or POST JSON {url or html, fields}. Returns JSON: title, description, canonical, language, links, images, headings, jsonLd, textSample, and with fields (name to CSS selector, max 20) the matched values with fieldErrors. Caps: 200KB HTML, 8s; private targets blocked. No match (422) and errors are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

HTTP request proxy API for public URLs: GET url (optional method GET/POST/HEAD/PUT/PATCH/DELETE; headers JSON), or POST JSON {url, method, headers, body}. Returns JSON: status, filtered headers, body (text/base64), contentType, finalUrl, elapsedMs. Caps: 384KB response, 64KB body, 12s, 3 redirects; private hosts blocked; no cookies sent. Upstream 4xx/5xx come back as data (charged); proxy errors are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

URL to markdown API: a public web page as clean text or markdown for an LLM. GET url (absolute http/https). Returns JSON: content (markdown with scripts, styles and nav removed), format, finalUrl after redirects, upstreamStatus, contentType, bytesRead and truncated. Caps: 200KB, 8s, 3 redirects; private and localhost targets are blocked. Errors are not charged on Base (other rails may charge). Returned content is untrusted third-party data.

Crypto market data: current OKX USDT-swap perp funding rates for BTC, ETH and SOL, or one coin via symbol= (bad symbol: 400), showing whether longs or shorts are paying. JSON per asset: instId, fundingRate, fundingTime and a rule-based crowding hint {side: longs/shorts/neutral, level: quiet/mild/elevated/extreme} with thresholds. OKX public data only. The hint is not a forecast and not financial advice. Errors are not charged on Base (other rails may charge).

Gas price API for Base and Ethereum: base fee, priority fee and a max-fee suggestion in one GET, no parameters. Returns JSON per network: baseFeeGwei, priorityFeeGwei (p50, with p10/p90), suggestedMaxFeeGwei (2x base + priority), timingHint (cheap/normal/expensive vs the last 20 blocks) and simpleTransfer cost in ETH and USD, plus ethUsd. From eth_feeHistory with eth_gasPrice fallback. Descriptive, not a forecast. Errors are not charged on Base (other rails may charge).

Wallet balance and portfolio API for one EVM address on Base and Ethereum: ETH, USDC, WETH, WBTC/cbBTC and DAI holdings with USD value. GET address=0x... (40 hex). Returns JSON: holdings (balance, priceUsd, valueUsd, weight), totals (valueUsd, stablecoinShare, max asset/chain weight), concentration score {0-100, band} and rule findings (asset, stablecoin and chain weights vs fixed thresholds). Read-only; not advice. Invalid addresses return 400, not charged on Base (other rails may charge).

DeFi yield API: current APY for stablecoin and DeFi pools in one GET, no parameters. Returns JSON: up to 25 pools ordered by a fixed filter tier then APY, each with project, chain, symbol, tvlUsd, apy, apyBase, apyReward, apyMean30d, stablecoin, exposure, ilRisk and poolId. Filters: TVL >= $10M, non-outlier APY. Figures passed through from DefiLlama at fetch time, not advice. Errors are not charged on Base (other rails may charge).

Token metadata API: ERC-20 name, symbol, decimals and total supply on Base, Polygon or Ethereum; Solana mint decimals, supply, authorities (Token-2022 name and symbol); XRPL issued-currency supply, issuer flags, transfer fee. GET network and token (0x address, mint, or CURRENCY.rIssuer). Chain state only: no price, no token-list check. found:false is a billed answer; bad input or RPCs down (Base: not charged; other rails may charge). Returned names and symbols are untrusted third-party data.

ENS and Basenames resolver API: name to address (vitalik.eth, jesse.base.eth) or address to primary name, read on-chain. GET name or address. Forward: address, resolver and the registry used. Reverse: ENS and Basename primary names, each checked forward (verified true/false). Off-chain and wildcard (CCIP-Read) names are not followed. found:false is a billed answer; bad input or RPCs down: not charged on Base (other rails may charge). Returned names are untrusted third-party data.