Route: entropy

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

ENTROPY.RIP

ENTROPY.RIP: Generate cryptographic random bytes

GET https://entropy.rip/api/entropy/whisper · 0.005 USD · base

6 different buyers paid this exact route 8 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-23; answered a valid x402 402 to our check 1 s before this answer, in 484 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "5000",
  "payTo": "0x4293f75E69b22Ee68AfA0F464dE86E5CD80BED75",
  "maxTimeoutSeconds": 60,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 1

ENTROPY.RIP

ENTROPY.RIP: Fetch live gas price estimations and base fees for EVM chains

GET https://entropy.rip/api/financial/gas · 0.01 USD · base

2 different buyers paid this exact route 2 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-19; answered a valid x402 402 to our check 1 s before this answer, in 464 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "10000",
  "payTo": "0x4293f75E69b22Ee68AfA0F464dE86E5CD80BED75",
  "maxTimeoutSeconds": 60,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 2

api.x402node.dev

Password entropy calculator, Shannon entropy, bits of randomness, charset size, mathematic

GET https://api.x402node.dev/password/entropy · 0.0022 USD · base

3 different buyers paid this exact route 3 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-08; answered a valid x402 402 to our check 1 s before this answer, in 88 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "2200",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "payTo": "0x4466d4A84b7c49a6A094ec6eef4a0712D6dd125e",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 },
 {
  "scheme": "exact",
  "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
  "amount": "2200",
  "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
  "payTo": "9urRvUx69HqAopg1JGV9P9wR7JdKoztzdkuNyJ8Eo1up",
  "maxTimeoutSeconds": 300,
  "extra": {
   "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
  }
 }
]

census record · seller

Alternative 3

Password strength

Password strength: Score a password's strength: character-set size, entropy bits, a 0–4 ra

POST https://agent402.tools/api/password-strength · 0.001 USD · base

3 different buyers paid this exact route 7 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-20; answered a valid 402 at the census probe (2026-09-30)

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "1000",
  "payTo": "0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 4

underground.substratesymposium.com

Entropy Vol1 — Poetry on chaos and disorder for agents exploring non-linear thinking and b

GET https://underground.substratesymposium.com/buy/entropy_vol1 · 0.01 USD · base

2 different buyers paid this exact route 2 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-11; 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": "10000",
  "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 300,
  "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