Every agent-payable API.

Resolve an ENS name to an address, or reverse-resolve an address to its primary ENS name

Pre-payment check of an x402 endpoint: one unpaid request, decodes the 402 offer (v1/v2): network, USDC or not, USD price, payTo, testnet, red flags.

A fortune cookie: one short, upbeat fortune (80 written for this service) and six lucky numbers from 1 to 49. Give a seed for a repeatable draw.

The text of a Bible verse or passage by reference (John 3:16, Romans 8:28-30, Psalm 23, Genesis 1:1-2:3, 1 Cor 13:4-7), up to 200 verses, verse by verse, from public-domain translations: Berean Standard Bible, World English Bible, King James Version. Optionally the same passage in other translations to compare. Unknown references answer 404 and are not charged.

A random Bible verse: from about 320 often quoted, encouraging verses (pool=popular, default), or from all 31,000 (pool=all), optionally only the Old or New Testament. Public-domain translations: BSB, WEB, KJV.

One well-known Bible verse or short passage per day, the same for every caller on a date (UTC), chosen from about 320 often quoted verses. For a daily devotional, a greeting, or a status message. Public-domain translations: BSB, WEB, KJV.

Find Bible verses containing every given word (in any order), or an exact phrase in double quotes, in one public-domain translation (BSB, WEB, KJV); optionally within one book or testament. Returns the total count and up to 100 verses in canonical order.

A random family-friendly joke with setup and punchline as separate fields, written for this service (133 jokes), optionally from one category: dad, programming, ai, science, math, animals, food, work, crypto. Give id to get one joke again.

Draw an omikuji, the fortune slip of Japanese shrines and temples, in English: the fortune (Great blessing 大吉 17%, Blessing 吉 35%, Middle blessing 中吉 6%, Small blessing 小吉 4%, Future blessing 末吉 8%, Bad fortune 凶 30%), a message, and readings for wish, awaited person, lost item, travel, business, study, love and health, with a lucky number, color and direction. Give a seed for a repeatable draw.

Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)

Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)

Every day with hail at a US address or lat/lon over up to 5 years (from 2020-10-14): the dates when NOAA's radar estimate of hail size (MRMS MESH) reached 0.75 inch or a size you choose within 1, 3, 5 or 10 miles, with the largest size each day. For property due diligence, roof age questions and claim history. Not found addresses are not charged.

Hail at a US address or lat/lon on one date: the largest NOAA radar estimate of hail size (MRMS MESH) at the place and within 1, 3, 5 and 10 miles, NEXRAD hail signatures, nearby spotter reports, and a verdict (hail_likely, hail_possible, no_hail_detected). Dates from 2020-10-14. For roofing, insurance claims and property checks. Not found addresses and dates without data are not charged.

A one-page hail report for a US address and date to share with a homeowner, adjuster or contractor: verdict, largest radar hail estimates by distance, a map of hail sizes within 10 miles, radar hail signatures in time order (when it fell), spotter reports, and NOAA's final Storm Events record with damage notes when published. Returns a private link valid for 1 year. Not found addresses are not charged.

Heartbeat endpoint billed via a batch-settlement payment channel. Independently monitored by x402-list.com: 100% uptime since Oct 27, 2026, 14/14 x402 compliance checks (as of Oct 31, 2026). Evidence: https://x402-list.com/services/agentx402pay

Heartbeat endpoint billed via a batch-settlement payment channel

Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth). Returns availability, the mint fee and where to register.

Check whether an ENS identity name for an AI agent, API or MCP server is available on x402 Identity Hub (*.402bot.eth, *.402api.eth, *.402mcp.eth). Returns availability, the mint fee and where to register.

The dominant colors of an image with their share of it, and its average color, as hex and RGB, for palettes, theming and search.

Apply up to 10 operations in order: rotate (angle), flip, flop, grayscale, blur (sigma), sharpen, negate, trim (cut uniform borders), tint (color), modulate (brightness, saturation, hue).

Make an image smaller in bytes: re-encode it (mozjpeg for JPEG, palette quantization for PNG) with metadata removed, optionally scaled down to a maximum width or converted, and report how much was saved.

A square thumbnail of an image, smart-cropped around its most interesting region, as WebP by default.

Format, dimensions, megapixels, bytes, channels, transparency, color space, bit depth, DPI, orientation, animation and pages, ICC profile, and EXIF camera details (make, model, date taken, exposure, aperture, ISO, focal length, GPS position) of an image at a URL.

What a page shows while an image loads: its BlurHash, a tiny blurred WebP preview as a data URL, its average color and its dimensions.

Cut a region out of an image (left, top, width, height), or, without left and top, crop it to the given size around its most interesting region (libvips attention strategy).

Convert an image at a URL to another format, with an optional quality or lossless encoding. JPEG output gets a white background where the image was transparent.

Resize an image at a URL to a width, a height or both, keeping the aspect ratio inside the box by default (cover, contain, inside, outside or fill), optionally converting it. Returns a signed URL of the result, valid for an hour.

Draw a line of text over an image at a corner, an edge or the center, with a size relative to the image width, a color and an opacity.

Call before trusting or paying a third-party x402 seller: catalog-vs-live integrity -- verify an x402 listing (payee, price, network, service, tags, bazaar block) against the live 402; an endpoint preflight for x402 catalog vs live offers, seller trust and listing consistency so an agent can skip dead or mismatched endpoints (JSON).

Call before trusting or paying a third-party x402 seller: catalog-vs-live integrity -- verify an x402 listing (payee, price, network, service, tags, bazaar block) against the live 402; an endpoint preflight for x402 catalog vs live offers, seller trust and listing consistency so an agent can skip dead or mismatched endpoints (JSON).

x402 market intelligence with current catalog-attributed USDC flow, address-level demand signals and separately labeled value-matched history. Attribution is not exclusive protocol-intent proof.

Get full detail (yes/no prices, volume, status, result) for a single Kalshi market by ticker

Returns a Markdown launch kit and seven-day checklist for an x402 service.

Heuristic calls-vs-unique-payers pattern score for the top x402 resources in the CDP Bazaar and PayAI catalogs: per resource price_usdc, unique_payers, calls, wash_risk (low/medium/high) and a reason. No input. A heuristic signal for due diligence before spending, not a finding about any seller. Cached 15 minutes.

Top 3 x402 resources by heuristic calls-vs-unique-payers pattern score from the CDP Bazaar and PayAI catalogs, with host, resource, unique_payers, calls and wash_risk (a heuristic score, not a finding about any seller). No input. Full scored list: /v1/listing-quality ($0.01).

Call before trusting or paying a third-party x402 seller: snapshot one listing from a fixed public directory (payapi, cdp, payai, bazaar) by its id/payTo, or pass ?since= to get told whether it changed since you last saw it. Reads public directories only - never a caller-supplied URL - and returns already-public fields (JSON).

Call before trusting or paying a third-party x402 seller: snapshot one listing from a fixed public directory (payapi, cdp, payai, bazaar) by its id/payTo, or pass ?since= to get told whether it changed since you last saw it. Reads public directories only - never a caller-supplied URL - and returns already-public fields (JSON).

Filter a JSON/NDJSON event log by field/operator/time range; returns matching events. Use when an agent needs to pull matching rows (thresholds, equality, substring, threshold crossings, time windows) out of a log or metrics event list. Body: {events:[...]|"<ndjson>", filter:{field,op,value?,direction?,timeField?,from?,to?,limit?}}. Ops: gt,gte,lt,lte,eq,ne,contains,crosses_threshold. Free demo at POST /demo; docs at /openapi.json.

Base mainnet transaction finality check: given a tx hash, classifies it as not_found, pending, unsafe (sequencer-confirmed only), safe (L1-attested), or finalized (L1-finalized) -- read directly from the node's own safe/finalized block tags, not a modeled reorg probability. Input: tx hash. Output: JSON.

Which x402 sellers actually earn? The top Bazaar sellers on Base ranked by measured revenue or paying wallets: 24-hour and 7-day revenue, payments, unique payers, repeat and returning payer share, top payer share, price range, categories and a likely-wash flag (one wallet doing the volume). Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers.

The x402 economy in one call: measured daily spend across the top Bazaar sellers on Base, split into organic, likely wash and known samplers/graders, with 7-day totals, the top categories by spend and the top buyer wallets (addresses, labeled when known). Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers.

One x402 seller's measured revenue and buyers, by host (blockrun.ai) or payTo address: the latest day's revenue, payments, unique and repeat payers, top payer share and wash flags, its 7-day totals, and up to 90 days of daily history. Measured from USDC transfers of $5 or less into each seller's payTo on Base, one UTC day at a time, with the day it covers.

Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, polygon, arbitrum, optimism) — eth_call, eth_getBalance, eth_getTransactionReceipt, eth_getBlockByNumber, and more

Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, polygon, arbitrum, optimism) — eth_call, eth_getBalance, eth_getTransactionReceipt, eth_getBlockByNumber, and more

Use when an agent is about to pay an unknown x402 endpoint and needs a cheap safety gate. Input: url (https x402 resource), method, optional max_price_usd. Output: JSON verdict ALLOW/WARN/DENY with reasons: live quote now, price vs similar routes and your budget, payTo on the OFAC list, price change vs our last measurement, our 7-day uptime/p95, ERC-8004 registration. Never pays; cached 60 s. Example: ?url=https://1gateway.dev/v1/fx/rates&max_price_usd=0.01

Use when an agent or seller must confirm a payment before delivering: checks a Base, Base Sepolia or Solana transaction for a USDC transfer to pay_to of at least amount. Input: tx (hash or signature), pay_to, network (default eip155:8453), optional amount in USDC. Output: JSON paid true/false, verdict, received, payers, block, time, confirmations. Bad formats refused before payment. Example: ?tx=0x…&pay_to=0x…&amount=0.01

The smallest real x402 paid call: costs $0.001 in USDC and returns ok with the server time and payment network. Useful for checking that an x402 client can sign and settle a payment end to end.

The smallest real x402 paid call: costs $0.001 in USDC and returns ok with the server time and payment network. Useful for checking that an x402 client can sign and settle a payment end to end.

Get full detail (prices, volume, liquidity, resolution) for a single Polymarket market by slug

Should an agent pay this x402 endpoint? One read-only call (never pays): validates the 402 + accepts[] (will it settle), labels liveness LIVE|ZOMBIE|DEAD, flags a >=$1000 price-trap honeypot (=> AVOID), scans resource + MCP tools for LLM01/LLM08 injection, screens payTo vs OFAC/scam, checks price (live vs advertised: MATCH|OVERCHARGE|UNDERCHARGE) and Attack-III cache-leakage posture. Returns PAY|CAUTION|AVOID + fix hints. Not a settlement guarantee.