Agent Exchange x402 census and directory

Route: derivatives

Say what you need in plain words. You get back the paid API that buyers actually pay for and that answers right now. It comes with the exact request to send and that seller's payment terms, read seconds ago, so you can pay with your first request. Free: no key, no account.

The answer

Onchain Query API

Onchain Query API: Crypto perpetual-futures snapshot for a symbol in ONE call (Binance USD

GET https://chain.cyberwarex.com/derivatives · 0.005 USD · base

3 different buyers paid this exact route 41 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-25; answered a valid x402 402 to our check 1 s before this answer, in 476 ms

Payment terms (sign and send with the first request)
[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "5000",
  "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 1

Kronos Crypto Data & Forecasts

Kronos Crypto Data & Forecasts: Real-time crypto derivatives signals for BTC/ETH/SOL/BNB/X

GET https://kronossignals.com/api/v1/signals/sol · 0.02 USD · base

3 different buyers paid this exact route 10 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-21; answered a valid x402 402 to our check 1 s before this answer, in 1689 ms

Payment terms (sign and send with the first request)
[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "20000",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 2

Kronos Crypto Data & Forecasts

Kronos Crypto Data & Forecasts: Crypto market-wide derivatives snapshot: funding rate, ope

GET https://kronossignals.com/api/v1/overview · 0.02 USD · base

6 different buyers paid this exact route 17 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-18; answered a valid x402 402 to our check 1 s before this answer, in 199 ms

Payment terms (sign and send with the first request)
[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "20000",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 3

tokenguard

tokenguard: Per-contract derivatives tickers: mark price, basis, volume.

POST https://eltociear-tokenguard.hf.space/derivatives_tickers · 0.02 USD · base

3 different buyers paid this exact route 3 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-18; answered a valid 402 at the census probe (2026-10-22)

Payment terms (sign and send with the first request)
[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "20000",
  "payTo": "0x5bCDA55247B238a573A968B234F788a2D35664Dd",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 4

Crypto Derivatives Snapshot

Crypto Derivatives Snapshot: Crypto derivatives snapshot of one coin in one call: perp fun

GET https://derivs.duoleads.com/v1/derivatives-snapshot · 0.005 USD · base

2 different buyers paid this exact route 3 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-24; answered a valid 402 at the census probe (2026-10-22)

Payment terms (sign and send with the first request)
[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "5000",
  "payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 120,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Only routes that answered a valid x402 402 at our census probe; the top three are checked again at answer time and one that answers goes first. Order: how well the route's own description matches your words, then distinct buyers of that exact route in 30 days and its calls (Coinbase CDP catalogue), paid in the last 7 days, input schema published, then lower price. Paid placement never changes this order; it shows only under sponsored.

Sponsored (paid placement, not ranked): Foundations Elements

For agents

GET https://bazaar.agentexchange.work/route.json?need=bitcoin%20price or POST https://bazaar.agentexchange.work/route {"need":"..."}, or the MCP tool route at https://bazaar.agentexchange.work/mcp. Optional filters: max_price_usd, network.

What buyers pay for most (30 days)

crypto · llm · inference · market-data · gateway · security · defi · ai-agents · web · finance · onchain · health · on-chain · analytics · search · evm · stocks · research · macro · trading · wallet · blockchain · monitoring · weather · generator · compliance · token · payment · price · ethereum · sec · smart-money · utility · solana · network · mcp · rest · erc20 · geo · time · address · text · validation · hyperliquid · chain · transaction · bitcoin · random · markdown · social · gas · uptime · public-records · status · twitter · forecast · seo · timestamp · clock · identifiers

All needs