x402.agentindex.world
Base · payout 0xb3f32bdfe8d07825bc0d7387295ab1d7559ba69d
Answers HTTP 402
4 of 4 probed endpoints answered HTTP 402 with a parseable payment payload
checked 2026-10-03
Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.
x402-style payments, last 7 days (Base)
99 x402-style payments from 8 distinct payers, $0.20 USDC in the last 7 days (Base, exact read)
window ended 2026-10-05
- Payments
- 99
- Outside payers
- 8
- USDC
- 0.2
All USDC received at this payout address: $0.20 (includes payments that are not x402)
Method: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's exact scheme uses. Some non-x402 gasless sends use it too.
Reading: x402-style payments to this payout address on Base, exact read of the 7 days to 2026-10-05, every block of the window: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's `exact` scheme uses. Some non-x402 gasless sends use it too; Sato Hub's own payer wallets are left out
Delivery is not measured. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.
Chains · one payout address, each chain read on its own
| Chain | Payout address | Listings | Answers 402 | x402-style payments |
|---|---|---|---|---|
| Base | 0xb3f32bdfe8d07825bc0d7387295ab1d7559ba69d | 104 | 4 of 4 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-03 | 99 x402-style payments from 8 distinct payers, $0.20 USDC in the last 7 days (Base, exact read) |
- Hosts
- x402.agentindex.world
- Listings
- 104 registered in the x402 catalogue
- Price range
- $0.0010 to $0.010 per call, as registered
- Categories (auto)
- Developer tools (34), Onchain data (24), Other (22), Inference (11), Media (4), Search (3), Web data (3), Identity (1), Market data (1), Security (1)
- First seen
- 2026-10-05 · last seen 2026-10-05
Claim this merchant
Sign a message from the payout address 0xb3f32b…9ba69d to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.
Registrations · 104
| Endpoint | Chain | Category | Price | Catalogue date |
|---|---|---|---|---|
https://x402.agentindex.world/agent-health 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. Returns a 0-100 score, verdict and issues. Try GET … | Base | Developer tools | $0.001 | 2026-09-27 |
https://x402.agentindex.world/base/block-number Latest Base mainnet block height via eth_blockNumber - the current chain tip. | Base | Onchain data | $0.001 | 2026-10-03 |
https://x402.agentindex.world/base/chain-id Base mainnet chain ID (EIP-155) via eth_chainId - confirm which network you're actually talking to. | Base | Onchain data | $0.001 | 2026-10-03 |
https://x402.agentindex.world/base/network-info Base mainnet network info in one call: chain ID, block height, and current gas price (wei and gwei). | Base | Onchain data | $0.001 | 2026-10-03 |
https://x402.agentindex.world/can-pay 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 GET /can-pay/sample. | Base | Onchain data | $0.001 | 2026-09-27 |
https://x402.agentindex.world/crypto 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. | Base | Market data | $0.001 | 2026-09-27 |
https://x402.agentindex.world/decide 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 decision primitives), not generated text. Powered by … | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/discover Find MCP servers matching a need, ranked by semantic similarity over a curated snapshot of 10101 MCP servers. Returns name, endpoint, description, source registry and a 0-1 relevance per match. Paid POST: up to 25 match… | Base | Search | $0.001 | 2026-09-27 |
https://x402.agentindex.world/fraction/simplify Simplify a fraction to lowest terms and return its decimal value. | Base | Other | $0.001 | 2026-10-03 |
https://x402.agentindex.world/gas-price 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/sample. | Base | Onchain data | $0.001 | 2026-09-27 |
https://x402.agentindex.world/geo/bbox Bounding box (min/max lat and lon) enclosing a list of points. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/geo/bearing Initial compass bearing (0-360 degrees, clockwise from true north) from point 1 to point 2. | Base | Other | $0.001 | 2026-10-03 |
https://x402.agentindex.world/geo/distance Great-circle distance between two lat/lon points (haversine formula). Returns km, mi or nm. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/geo/dms Convert decimal degrees to degrees/minutes/seconds, or DMS back to decimal degrees. | Base | Media | $0.001 | 2026-10-03 |
https://x402.agentindex.world/geo/geohash Encode a lat/lon point into a geohash string (precision 1-12 characters). | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/geo/midpoint Geographic (great-circle) midpoint between two lat/lon points. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/geo/point-in-polygon Ray-casting point-in-polygon test (planar approximation - fine for city/region-scale polygons). | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/guard 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 only: like any LLM-based judge it is sensitive to p… | Base | Inference | $0.001 | 2026-09-27 |
https://x402.agentindex.world/json/flatten Flatten a nested JSON document into single-level dotted-path keys. | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/json/query Query a JSON document with a JSONPath expression. | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/json/schema-infer Infer a basic JSON Schema (types, object properties, array item type) from an example document. | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/json/validate Validate a JSON document against a JSON Schema. | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/llm/gpt-mini 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 fixed price computed from your max_tokens; unused to… | Base | Inference | $0.001 | 2026-09-30 |
https://x402.agentindex.world/llm/llama 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 from your max_tokens; unused tokens are not refun… | Base | Inference | $0.001 | 2026-09-30 |
https://x402.agentindex.world/money/allocate 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. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/money/format Format a numeric amount with thousands separators, a chosen decimal precision and a currency symbol. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/news Top Hacker News headlines right now - title, URL, score, comments. Fresh links for agents that need current tech/startup signal. Try GET /news/sample. | Base | Web data | $0.001 | 2026-10-05 |
https://x402.agentindex.world/number/ordinal Convert an integer to its English ordinal form (1st, 2nd, 3rd, 4th, 11th, 21st...). | Base | Media | $0.001 | 2026-10-03 |
https://x402.agentindex.world/number/radix Convert a number's string representation from one base (2-36) to another. | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/number/roman Convert an integer (1-3999) to a Roman numeral, or a Roman numeral back to an integer. | Base | Media | $0.001 | 2026-10-03 |
https://x402.agentindex.world/number/words Convert an integer into English words. | Base | Media | $0.001 | 2026-10-03 |
https://x402.agentindex.world/probe 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. | Base | Web data | $0.001 | 2026-09-27 |
https://x402.agentindex.world/rank Rank up to 50 documents by relevance to a query in a single call - each document returned with its relevance probability, sorted highest first. Try GET /rank/sample. | Base | Other | $0.001 | 2026-09-27 |
https://x402.agentindex.world/regex/replace Replace regular expression matches in text, with an optional max-replacement count. | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/regex/test Test a regular expression against text; returns match status, capture groups and span. | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/search Web search: search the web and get ranked results with page content. Up to 10 results with title, URL, snippet and publish date, plus clean full-page Markdown for the top 3 by default. Up to 5 queries per call, merged a… | Base | Search | $0.001 | 2026-09-28 |
https://x402.agentindex.world/stats/correlation Pearson correlation coefficient between two equal-length numeric series. | Base | Other | $0.001 | 2026-10-03 |
https://x402.agentindex.world/stats/percentile Nth percentile of a list of numbers (linear interpolation between closest ranks). | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/stats/regression Ordinary least squares simple linear regression (y = slope*x + intercept) with R-squared. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/stats/summary Descriptive statistics for a list of numbers: count, mean, median, sample stdev/variance, min, max. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/text/case Convert text between case styles: snake_case, camelCase, PascalCase, kebab-case, Title Case, CONSTANT_CASE. | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/text/diff Unified line diff between two texts, plus an overall similarity ratio (0-1). | Base | Developer tools | $0.001 | 2026-10-02 |
https://x402.agentindex.world/text/readability Flesch Reading Ease and Flesch-Kincaid Grade Level scores for English text (standard public formulas, heuristic syllable counting). | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/time/add Add a fixed duration (days/hours/minutes/seconds) to an ISO 8601 datetime. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/time/between Duration between two ISO 8601 datetimes, as total seconds and a days/hours/minutes/seconds breakdown. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/time/business-days Count weekdays (Mon-Fri) between two dates, inclusive of both endpoints. | Base | Other | $0.001 | 2026-10-03 |
https://x402.agentindex.world/time/convert Convert an ISO 8601 datetime from one IANA timezone to another (handles DST automatically). | Base | Developer tools | $0.001 | 2026-10-03 |
https://x402.agentindex.world/time/format Format an ISO 8601 datetime using a strftime pattern. | Base | Other | $0.001 | 2026-10-02 |
https://x402.agentindex.world/time/iso-week ISO 8601 week number, ISO year and ISO weekday (1=Monday) for a date. | Base | Other | $0.001 | 2026-10-03 |
https://x402.agentindex.world/time/parse Parse a date/time string (ISO 8601 by default, or a given strptime format) into its components. | Base | Developer tools | $0.001 | 2026-10-03 |
Descriptions are the seller’s own words from the catalogue and are not checked by us. A listed price is a registration, not an observed charge.
Data CC-BY-4.0, attribution: data by satohub.ai. Collector run 2026-10-05. Appearing here is not an endorsement. Check an endpoint with the doctor.