117 resources listed under x402.agentindex.world.
Source: https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources · last updated 2026-10-14
These 117 resources were mirrored from Coinbase's public Bazaar. Claim them all at once by submitting your own manifest — no account required, and it always overrides the mirrored copy.
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Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payme…
Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or a…
Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. R…
Top Hacker News headlines right now - title, URL, score, comments. Fresh links for agents that need current tech/startup signal. Try GET /news/sample.
Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try…
Fetch URL content as Markdown: read any web page and get clean Markdown - navigation, ads and boilerplate stripped, links resolved, plus a real token count. The same ext…
Extract a public PDF (by HTTPS URL or base64) into clean Markdown - headings and tables preserved via layout-aware parsing, plus title/author/page count/date metadata an…
Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.
Jev-routed web search: each query goes to the best specialised source (code, facts, news, prices), results ranked by relevance. 28/30 test queries answered. Up to 10 res…
Human-readable relative time ('2 hours ago', 'in 3 days') between a datetime and a reference (default now).
Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} place…
Slugify text: strip accents, lowercase, replace non-alphanumerics with a separator.
Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/s…
437 models, no account, no API key, pay per call in USDC - OpenAI-compatible chat completions and AI inference gateway (Claude, GPT, Gemini, Llama, Mistral and more in o…
Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price…
Ask up to 20 typed yes/no, multiple-choice or ordinal-scale questions about one shared piece of context in a single call - each answered with a real probability (Jev dec…
Flatten a nested JSON document into single-level dotted-path keys.
Find MCP servers matching a need, ranked by semantic similarity over a curated snapshot of MCP servers. Returns name, endpoint, description, source registry and a 0-1 re…
Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contra…
Base token safety check: Claude Haiku 5.5 (Anthropic) writes a rug pull / honeypot verdict (SAFE/CAUTION/RISKY/DANGER) from on-chain data, a tagline, a short explanation…
Voluntarily support AgentIndex with one cent of Base USDC. Returns payer identity, a thank-you acknowledgement and an x402 settlement receipt. Use this when an agent wan…
Generic read-only eth_call against any Base mainnet contract - pass raw calldata, get the raw return data back.
The current pending Base mainnet block (mempool, not yet mined) - unconfirmed transactions via eth_getBlockByNumber('pending').
Base transaction lookup by hash - sender, recipient, value, calldata, gas and block, live from Base mainnet via eth_getTransactionByHash.
Resolve a Basename, Base's native ENS-equivalent, to its wallet address via the L2 Basenames resolver.
Can I sell this token? Honeypot check that simulates a real buy then a real sell of a Base mainnet token in one atomic on-chain call via Uniswap V2 - if the sell reverts…
Contract introspection on Base mainnet - is it a contract, bytecode size, best-effort owner(), and whether it's a proxy.
ERC20 Transfer event logs for one token over a Base mainnet block range (max 2,000 blocks) via eth_getLogs.
Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, bu…
Simulate a Base mainnet transaction before sending it - will it succeed, estimated gas, and the decoded revert reason if it would fail.
Gas estimate for a Base mainnet swap or any other call (to/from/value/data) via eth_estimateGas, without broadcasting a transaction.
ERC20 allowance on Base mainnet via RPC: how much a spender is approved to move from an owner balance, read with allowance(owner,spender) eth_call.
Fetch a Base mainnet block header and transaction hashes by number, tag (latest/earliest/safe/finalized), or hash via eth_getBlockByNumber/eth_getBlockByHash.
Check whether a Base mainnet address is a contract via eth_getCode - returns bytecode size, zero for an externally-owned account.
ERC1155 multi-token balance for a wallet and token id on Base mainnet via balanceOf(address,uint256).
ERC20 token balance for a wallet on Base mainnet - balanceOf() and decimals() batched into one Multicall3 round trip.
Native ETH balance plus up to 20 ERC20 token balances for one wallet on Base mainnet, in a single Multicall3 round trip regardless of token count.
Next transaction nonce for any Base mainnet wallet via eth_getTransactionCount - how many transactions it has sent.
Slippage estimate, swap quote, and best DEX price on Base - compares Uniswap v2, Uniswap v3, and Aerodrome on-chain via Multicall3, returns amount received, chosen path,…
Total supply for an ERC20 (normalized by decimals()) or ERC721 (raw count, no decimals) contract on Base mainnet.
Text classification with your own custom labels (2-20) - categorize a support ticket, a review, or any text into the best-fitting label, with a confidence score and an a…
PII detection: flag whether text contains personally identifiable information (name plus contact details, email, phone, address, government ID, financial account) with a…
Detect whether hex-encoded bytes are ASCII, UTF-8, or UTF-16 with a BOM, by decode-validity and BOM presence (not statistical language detection).
Convert text between utf-8, base64, hex, URL-percent-encoding and ascii representations.
Compute an MD5, SHA-1, SHA-256 or SHA-512 hex digest of text.
Compute an HMAC (MD5, SHA-1, SHA-256 or SHA-512) of text with a given key.
Intent detection: classify text as a question, request, complaint, compliment, or other, with a confidence score and an alternate label. Powered by Jev, with an automati…
Recursive diff between two JSON documents: added, removed and changed paths.
Language detection: identify which of 20 common languages (or "other") a text is written in, with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM f…
Sentiment analysis: classify text as positive, negative, or neutral with a confidence score and an alternate label. Powered by Jev, with an automatic Groq-hosted LLM fal…
Spam detection: classify text as spam or not spam with a confidence score. Powered by Jev, with an automatic Groq-hosted LLM fallback if Jev is slow or unavailable - und…
Toxicity detection: classify text as toxic or not toxic (hate speech, harassment, threats, severe offensive language) with a confidence score. Powered by Jev, with an au…
ISO 13616 IBAN mod-97 checksum validation, with optional BIC (ISO 9362) format check.
Luhn (mod 10) checksum validation, as used by most payment card numbers.
North American VIN check-digit validation (NHTSA standard, position 9) plus WMI manufacturer lookup for a small set of known codes.
Claude Sonnet API - pay per call, no API key. OpenAI-format chat completions on anthropic/claude-sonnet-5.5, pinned to Anthropic's own OpenRouter endpoint for reliabilit…
Latest Base mainnet block height via eth_blockNumber - the current chain tip.
Base mainnet chain ID (EIP-155) via eth_chainId - confirm which network you're actually talking to.
Base mainnet network info in one call: chain ID, block height, and current gas price (wei and gwei).
Simplify a fraction to lowest terms and return its decimal value.
Bounding box (min/max lat and lon) enclosing a list of points.
Initial compass bearing (0-360 degrees, clockwise from true north) from point 1 to point 2.
Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm.
Convert decimal degrees to degrees/minutes/seconds, or DMS back to decimal degrees.
Encode a lat/lon point into a geohash string (precision 1-12 characters).
Geographic (great-circle) midpoint between two lat/lon points.
Ray-casting point-in-polygon test (planar approximation - fine for city/region-scale polygons).
Ask whether a tool call should run automatically, need human confirmation, or be denied, given the user's request - returns allow/ask/deny with a probability. Advisory o…
GPT Mini API - pay per call, no API key. OpenAI-format chat completions on openai/gpt-5.4-mini, pinned to OpenAI's own OpenRouter endpoint for reliability. You sign a fi…
Infer a basic JSON Schema (types, object properties, array item type) from an example document.
Split an integer amount of cents among N ratios with zero rounding loss (Fowler's allocation algorithm) - the parts always sum back to the original amount.
Format a numeric amount with thousands separators, a chosen decimal precision and a currency symbol.
Convert an integer to its English ordinal form (1st, 2nd, 3rd, 4th, 11th, 21st...).
Convert a number's string representation from one base (2-36) to another.
Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer.
Rank up to 50 documents by relevance to a query in a single call - each document returned with its relevance probability, sorted highest first. Powered by Jev (TypeSafe…
Replace regular expression matches in text, with an optional max-replacement count.
Nth percentile of a list of numbers (linear interpolation between closest ranks).
Pearson correlation coefficient between two equal-length numeric series.
Ordinary least squares simple linear regression (y = slope*x + intercept) with R-squared.
Descriptive statistics for a list of numbers: count, mean, median, sample stdev/variance, min, max.
Convert text between case styles: snake_case, camelCase, PascalCase, kebab-case, Title Case, CONSTANT_CASE.
Unified line diff between two texts, plus an overall similarity ratio (0-1).
Flesch Reading Ease and Flesch-Kincaid Grade Level scores for English text (standard public formulas, heuristic syllable counting).
Add a fixed duration (days/hours/minutes/seconds) to an ISO 8601 datetime.
Duration between two ISO 8601 datetimes, as total seconds and a days/hours/minutes/seconds breakdown.
Count weekdays (Mon-Fri) between two dates, inclusive of both endpoints.
Convert an ISO 8601 datetime from one IANA timezone to another (handles DST automatically).
ISO 8601 week number, ISO year and ISO weekday (1=Monday) for a date.
Parse a date/time string (ISO 8601 by default, or a given strptime format) into its components.
Convert a value between units of length, mass, volume or temperature (C/F/K).
EAN-8 or EAN-13 barcode checksum validation (auto-detected by length).
IMEI (15-digit mobile device identifier) Luhn checksum validation.
ISBN-10 or ISBN-13 checksum validation (auto-detected by length).
ISIN (ISO 6166 security identifier) Luhn checksum validation.
US ABA bank routing number (9-digit) checksum validation.
French SIRET (14-digit business establishment number) Luhn checksum validation. Note: the rare La Poste SIREN exception to the standard rule is not applied.
Check whether a source supports, contradicts, or gives insufficient information about a claim - a typed verdict with a real probability, not generated text. Powered by J…
Format an ISO 8601 datetime using a strftime pattern.
Test a regular expression against text; returns match status, capture groups and span.
One call replaces wallet-balance and gas reads across Base, Ethereum, Polygon, Arbitrum and Optimism. Returns native and USDC balances, current blocks, fees and Base x40…
Probe any public URL and report if it is an x402 paywall - price, network, payTo, scheme. Shop paywalls before you spend. Try GET /probe/sample.
Live spot prices for crypto coins (BTC, ETH, SOL, ...) in USD or another fiat, with 24h change. Accepts tickers or CoinGecko ids. Try GET /crypto/sample.
Check whether a Base wallet holds enough USDC to pay an x402 amount (default $0.001). Returns balance, can_pay, shortfall. The checklist agents run before spending. Try…
Query a JSON document with a JSONPath expression.
Validate a JSON document against a JSON Schema.
Convert an integer into English words.
Who owns this NFT? ERC721 owner lookup on Base mainnet via ownerOf(tokenId).
Smart contract event logs on Base mainnet (Base contract events) via eth_getLogs - filter by contract address and up to 4 topics, up to 2,000 blocks, raw logs with topic…
Is this Base contract an upgradeable proxy? Proxy contract detection for EIP-1967 (transparent/UUPS), beacon, or EIP-1822 patterns, returning the implementation address.
Transaction receipt via eth_getTransactionReceipt - status, gas used, and event logs for a mined Base mainnet transaction.
Read a contract storage slot on Base mainnet via eth_getStorageAt - the raw 32-byte value, decoded as hex and unsigned integer, zero-filled if unset.
NFT holdings for a wallet in one Base ERC721 collection, owned token IDs via ERC721Enumerable (tokenOfOwnerByIndex) - up to 20 tokens, requires the collection to impleme…
NFT metadata URI for an ERC721 token on Base mainnet via tokenURI - the on-chain pointer (IPFS, HTTP, or data URI), not a fetch of the document itself.
Buy a 30-day verified agent listing for $0.01 USDC. AgentIndex audits reachability, x402 compatibility and discovery manifests, then publishes a machine-readable registr…
Llama API - pay per call, no API key. OpenAI-format chat completions on meta-llama/llama-4-maverick, pinned to DeepInfra for reliability. You sign a fixed price computed…
Base token risk scan: on-chain rug check and honeypot-style flag detection for any ERC-20, no GoPlus, DexScreener or other vendor - real Base token safety. Reads bytecod…
All resources from this provider: /discovery/merchant (by payment address) or filter /discovery/resources.
