Agentropolis
payment-ready until 2026-11-18
Search engine for 52,000+ MCP servers, x402/MPP paid APIs and A2A agents, ranked by wash-filtered on-chain usage, plus first-party x402 kits (token honeypot/preflight, trade preflight, pay-guard, and more) payable in USDC on Base.
Compare: all web search APIs
Call it x402 v2
x402 v2
- Base URL
- https://agentropolis.io
- Payment
- x402 v2, header channel
$ curl -i 'https://agentropolis.io/api/v1/call/seenly.seenly-pay-guard' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 5 paid routes on agentropolis.io
POST/api/v1/call/seenly.seenly-kit-finder Base$0.05since 11-11
GET/api/v1/call/seenly.seenly-pay-guard Base$0.01since 11-11
GET/api/v1/call/seenly.seenly-presign-guard Base$0.02since 11-11
GET/api/v1/call/seenly.seenly-token-preflight Base$0.02since 11-11
GET/api/v1/call/seenly.seenly-trade-preflight Base$0.03since 11-11
Prices as captured in the 402 response: median $0.02 across the 5 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| POST | / | Kit Finder by Agentropolis: describe your project in plain English and get a ranked shortlist of MCP servers, x402/MPP paid APIs and agent kits for each need, with price, payment-verified trust score, why it fits, risky-seller flags, estimated stack cost per run and an x402 Bazaar link-out. Ranked by fit + trust only; no first-party boost, no paid placement. Advisory. | $0.05 | Base | USDC | header | since 11-11 |
| GET | / | Pay Guard: pre-payment allow/warn/block check for x402. Send your planned purchase (domain, max_price_usd, asset/network) plus the 402 challenge (payTo, amount, asset, network, resource). Returns verdict with wallet↔domain verification, price/asset/network checks, lookalike/URL safety, wash flags from Agentropolis, a free OFAC SDN sanctions screen of payTo (a screen, not a certificate), and an optional LMX Labs lookup as an extra signal (skipped if slow or down; never hard-blocks). Deterministic, no LLM. Free allowance: 5 calls/day per client network with no payment: add header "X-Free-Allowance: use" (or ?free=1) to a valid request. | $0.01 | Base | USDC | header | since 11-11 |
| GET | / | Base Pre-Sign Guard by Agentropolis: simulate a Base transaction before signing; returns asset changes, approvals (unlimited, Permit2, setApprovalForAll) and drainer-pattern flags -> ok / warn / block. Missing data defaults to warn. | $0.02 | Base | USDC | header | since 11-11 |
| GET | / | Token Preflight: pre-trade safety check for a Base ERC-20 (buy/sell simulation for honeypot and taxes, owner powers, liquidity, LP, holders, verification) with a shareable verdict card. Not investment advice. Free allowance: 3 calls/day per client network with no payment: add header "X-Free-Allowance: use" (or ?free=1) to a valid request. | $0.02 | Base | USDC | header | since 11-11 |
| GET | / | Trade Preflight by Agentropolis: one call before a Base token swap. Token Preflight honeypot/rug checks + simulated swap quote at your size + buy/sell price impact + suggested slippage cap -> go / caution / avoid. Not investment advice. | $0.03 | Base | USDC | header | since 11-11 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 5 payloads captured by the monitor.
219 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://seenly-token-preflight.vercel.app/api/token-preflight",
"tags": [
"token-security",
"honeypot",
"base",
"pre-trade",
"crypto"
],
"iconUrl": "https://seenly-token-preflight.vercel.app/icon.svg",
"mimeType": "application/json",
"description": "Token Preflight: pre-trade safety check for a Base ERC-20 (buy/sell simulation for honeypot and taxes, owner powers, liquidity, LP, holders, verification) with a shareable verdict card. Not investment advice. Free allowance: 3 calls/day per client network with no payment: add header \"X-Free-Allowance: use\" (or ?free=1) to a valid request.",
"serviceName": "Token Preflight"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"mode": "card",
"chain": "base",
"sizeUsd": 100,
"tokenAddress": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed"
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"grade": "OK",
"score": 80,
"checks": [
{
"id": "trade_simulation",
"label": "buy and sell simulate successfully",
"status": "pass"
}
],
"verdict": "OK (80/100) for DEGEN. Risk signals: top-10 holders own 61.8%; privileged functions: pause function. Simulated buy/sell OK (tax 0%/0%).",
"card_url": "https://seenly-token-preflight.vercel.app/c/<signed>",
"one_liner": "DEGEN on Base: OK 80/100. Top-10 holders own 61.8%; liquidity $614.0k.",
"disclaimer": "Not investment advice. ...",
"as_of_block": "52088888"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"tokenAddress"
],
"properties": {
"mode": {
"enum": [
"card",
"full"
],
"type": "string",
"default": "card",
"description": "card = verdict + compact checks; full = adds raw evidence."
},
"chain": {
"enum": [
"base"
],
"type": "string",
"default": "base",
"description": "Only Base mainnet (chain id 8453) in v1."
},
"sizeUsd": {
"type": "number",
"default": 100,
"maximum": 100000,
"minimum": 1,
"description": "Simulated trade size in USD."
},
"requestKey": {
"type": "string",
"maxLength": 128,
"description": "Optional idempotency key, echoed back."
},
"tokenAddress": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "ERC-20 token contract address on Base."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"grade",
"score",
"verdict",
"checks",
"as_of_block"
],
"properties": {
"grade": {
"enum": [
"OK",
"CAUTION",
"DANGER",
"UNKNOWN"
],
"type": "string",
"description": "Overall verdict grade."
},
"score": {
"type": "integer",
"maximum": 100,
"minimum": 0
},
"checks": {
"type": "array",
"items": {
"type": "object"
},
"description": "Per-check results: id, status (pass|warn|fail|unknown), label."
},
"verdict": {
"type": "string",
"description": "One-paragraph plain-English verdict."
},
"card_url": {
"type": [
"string",
"null"
],
"description": "Shareable signed verdict card."
},
"one_liner": {
"type": "string"
},
"disclaimer": {
"type": "string"
},
"simulation": {
"type": "object",
"description": "Buy/sell eth_call simulation summary: buy_ok, sell_ok, taxes, round-trip loss."
},
"as_of_block": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (4)
Captured payload 2 of 5
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://seenly-token-preflight.vercel.app/api/trade-preflight",
"tags": [
"trade-preflight",
"honeypot",
"rug-pull",
"slippage",
"price-impact",
"swap-quote",
"base",
"pre-trade",
"trading-agent"
],
"iconUrl": "https://seenly-token-preflight.vercel.app/icon.svg",
"mimeType": "application/json",
"description": "Trade Preflight by Agentropolis: one call before a Base token swap. Token Preflight honeypot/rug checks + simulated swap quote at your size + buy/sell price impact + suggested slippage cap -> go / caution / avoid. Not investment advice.",
"serviceName": "Trade Preflight"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"sizeUsd": 250,
"tokenAddress": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed"
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"summary": "GO for a $250 DEGEN trade on Base: no blocking signals for this size Suggested slippage cap 1.1% (buy).",
"decision": "go",
"token_preflight": {
"grade": "OK",
"score": 92
},
"price_impact_pct": {
"buy": 0.31,
"sell": 0.33
},
"suggested_slippage_cap_pct": {
"buy": 1.1,
"sell": 1.1
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"tokenAddress"
],
"properties": {
"chain": {
"enum": [
"base"
],
"type": "string",
"default": "base"
},
"sizeUsd": {
"type": "number",
"default": 100,
"maximum": 100000,
"minimum": 1,
"description": "Planned trade size in USD (quote, price impact and slippage are computed for this size)."
},
"requestKey": {
"type": "string",
"maxLength": 128
},
"tokenAddress": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "ERC-20 token on Base you plan to trade."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"decision",
"summary",
"reasons",
"price_impact_pct",
"suggested_slippage_cap_pct",
"token_preflight",
"as_of_block"
],
"properties": {
"quote": {
"type": [
"object",
"null"
],
"description": "Best simulated venue at the target size: dex, pool, amount_in, expected_tokens_out, effective_price_usd, min_tokens_out_at_cap."
},
"reasons": {
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"text": {
"type": "string"
},
"level": {
"type": "string"
}
}
}
},
"summary": {
"type": "string"
},
"decision": {
"enum": [
"go",
"caution",
"avoid"
],
"type": "string",
"description": "Pre-trade checklist signal for this size (not advice)."
},
"taxes_pct": {
"type": "object"
},
"disclaimer": {
"type": "string"
},
"as_of_block": {
"type": "string"
},
"token_preflight": {
"type": "object",
"description": "Full Token Preflight grade, score, verdict and checks."
},
"price_impact_pct": {
"type": "object",
"description": "buy / sell price impact (%) vs a small reference trade."
},
"suggested_slippage_cap_pct": {
"type": "object",
"description": "buy / sell slippage caps (%): impact + tax + 0.5 pt buffer."
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 5
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://seenly-token-preflight.vercel.app/api/presign-guard",
"tags": [
"transaction-simulation",
"pre-sign",
"drainer",
"approval",
"wallet-security",
"base",
"agent-wallet"
],
"iconUrl": "https://seenly-token-preflight.vercel.app/icon.svg",
"mimeType": "application/json",
"description": "Base Pre-Sign Guard by Agentropolis: simulate a Base transaction before signing; returns asset changes, approvals (unlimited, Permit2, setApprovalForAll) and drainer-pattern flags -> ok / warn / block. Missing data defaults to warn.",
"serviceName": "Base Pre-Sign Guard"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"data": "0x095ea7b30000000000000000000000001111111111111111111111111111111111111111ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"from": "0xcaA54748dA198081A89b6f369d798Ad78FC35B83",
"chain": "base",
"value": "0"
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"flags": [
{
"code": "approval_to_eoa",
"level": "block"
}
],
"summary": "BLOCK: Grants unlimited USDC to 0x1111…1111, a plain wallet (EOA), not a contract. This is the most common drainer pattern.",
"verdict": "block",
"asset_changes": []
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"properties": {
"to": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
},
"data": {
"type": "string",
"default": "0x",
"pattern": "^0x([0-9a-fA-F]{2})*$"
},
"from": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Signer address (transaction mode)."
},
"chain": {
"enum": [
"base"
],
"type": "string",
"default": "base"
},
"value": {
"type": "string",
"default": "0",
"description": "Wei, decimal or 0x hex."
},
"signer": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Signer address (typedData mode, optional)."
},
"typedData": {
"type": "object",
"description": "EIP-712 {domain, types, primaryType, message}. Decodes Permit (EIP-2612) and Permit2 PermitSingle/PermitBatch."
},
"requestKey": {
"type": "string",
"maxLength": 128
}
},
"description": "Either a transaction (from, to, data, value) or an EIP-712 typedData object to be signed."
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"verdict",
"summary",
"flags",
"approvals",
"asset_changes"
],
"properties": {
"flags": {
"type": "array",
"items": {
"type": "object",
"properties": {
"code": {
"type": "string"
},
"text": {
"type": "string"
},
"level": {
"type": "string"
}
}
}
},
"summary": {
"type": "string"
},
"verdict": {
"enum": [
"ok",
"warn",
"block"
],
"type": "string",
"description": "block = known drainer pattern; warn = risk or missing data (default when data is missing); ok = no known risk pattern."
},
"approvals": {
"type": "array",
"items": {
"type": "object"
},
"description": "Approvals granted: kind, token, spender, amount, unlimited, spender_is_contract, spender_label."
},
"disclaimer": {
"type": "string"
},
"simulation": {
"type": "object"
},
"as_of_block": {
"type": [
"string",
"null"
]
},
"asset_changes": {
"type": "array",
"items": {
"type": "object"
},
"description": "Signer-side asset changes from the simulation: asset, symbol, sent, received, direction."
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 5
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://seenly-kit-finder.vercel.app/api/find",
"tags": [
"discovery",
"x402",
"mcp",
"agent-tools",
"recommendation",
"tool-search",
"stack-builder"
],
"iconUrl": "https://seenly-kit-finder.vercel.app/icon.svg",
"mimeType": "application/json",
"description": "Kit Finder by Agentropolis: describe your project in plain English and get a ranked shortlist of MCP servers, x402/MPP paid APIs and agent kits for each need, with price, payment-verified trust score, why it fits, risky-seller flags, estimated stack cost per run and an x402 Bazaar link-out. Ranked by fit + trust only; no first-party boost, no paid placement. Advisory.",
"serviceName": "Kit Finder (project description → ranked agent tool stack)"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"description": "An AI research agent that searches the web, scrapes about 20 pages, summarizes them, and emails me a daily report on competitors in the solar panel market.",
"budget_per_run_usd": 0.5
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"kit": "seenly.kit-finder",
"needs": [
{
"why": "Find competitor news and pages each day.",
"need": "web search",
"picks": [
{
"id": "x402.you-com-search-api",
"buy": {
"how": "Pay per call with x402 through the Agentropolis relay (non-custodial) or call the seller directly.",
"relay": "https://agentropolis.io/api/v1/call/x402.you-com-search-api"
},
"fit": 95,
"why": "General web search returning ranked results an agent can scrape next.",
"kind": "http_api",
"name": "You.com Search API",
"rank": 1,
"flags": [
"wide_price_range: $0.005–$0.11 per call (x402); check the live 402 before paying"
],
"price": "$0.005–$0.11 per call (x402)",
"score": 91.8,
"trust": {
"score": 89,
"evidence": "verified_non_wash_payments"
},
"price_usd": {
"max": 0.11,
"min": 0.005
},
"listing_url": "https://agentropolis.io/listing/x402.you-com-search-api"
}
],
"searched": [
"web search API",
"search engine"
],
"calls_per_run": 1
}
],
"summary": "The agent needs web search, page scraping and email sending.",
"advisory": true,
"fairness": "Ranked by fit + trust only. Agentropolis's own kits get no boost; paid placement is never read.",
"also_search": [
{
"url": "https://agentic.market/?q=web%20search",
"name": "Coinbase Agentic.Market (x402 Bazaar)",
"note": "Link-out only. We do not cache or republish CDP Bazaar data."
}
],
"check_version": "kit-finder-0.1.0",
"risky_sellers": [],
"stack_cost_per_run": {
"basis": "Top pick per need x estimated calls per run, from listed prices. Seller runtime 402 challenges are authoritative.",
"max_usd": 0.21,
"min_usd": 0.105,
"budget_usd": 0.5,
"within_budget": true,
"unpriced_needs": [
"email sending"
]
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"description"
],
"properties": {
"paid_only": {
"type": "boolean",
"description": "Optional: only paid (x402 / MPP) tools."
},
"requestKey": {
"type": "string",
"maxLength": 128
},
"description": {
"type": "string",
"maxLength": 2000,
"minLength": 12,
"description": "Plain-English description of your project / agent and what it needs to do."
},
"max_results": {
"type": "integer",
"maximum": 5,
"minimum": 1,
"description": "Optional: picks per need (default 3)."
},
"budget_per_run_usd": {
"type": "number",
"maximum": 1000,
"minimum": 0,
"description": "Optional: your per-run tool budget in USD (the result says whether the suggested stack fits)."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"verdict",
"risk",
"advisory"
],
"properties": {
"risk": {
"type": "number"
},
"tools": {
"type": "object"
},
"summary": {
"type": "string"
},
"verdict": {
"enum": [
"allow",
"review",
"block"
],
"type": "string"
},
"advisory": {
"type": "boolean"
},
"findings": {
"type": "array",
"items": {
"type": "object"
}
},
"consensus": {
"type": "object"
},
"provenance": {
"type": "object"
},
"agentropolis": {
"type": "object"
},
"recommendation": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 5
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://seenly-pay-guard.vercel.app/api/guard",
"tags": [
"security",
"x402",
"payment-guard",
"fraud",
"lookalike",
"wash-trading",
"ofac",
"sanctions-screening"
],
"iconUrl": "https://seenly-pay-guard.vercel.app/icon.svg",
"mimeType": "application/json",
"description": "Pay Guard: pre-payment allow/warn/block check for x402. Send your planned purchase (domain, max_price_usd, asset/network) plus the 402 challenge (payTo, amount, asset, network, resource). Returns verdict with wallet↔domain verification, price/asset/network checks, lookalike/URL safety, wash flags from Agentropolis, a free OFAC SDN sanctions screen of payTo (a screen, not a certificate), and an optional LMX Labs lookup as an extra signal (skipped if slow or down; never hard-blocks). Deterministic, no LLM. Free allowance: 5 calls/day per client network with no payment: add header \"X-Free-Allowance: use\" (or ?free=1) to a valid request.",
"serviceName": "Pay Guard"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"asset": "USDC",
"domain": "seenly-payload-check.vercel.app",
"network": "eip155:8453",
"challenge": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE",
"amount": "30000",
"network": "eip155:8453",
"resource": "https://seenly-payload-check.vercel.app/api/check"
},
"max_price_usd": 0.05
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"kit": "seenly.pay-guard",
"advice": "Safe to sign this 402 challenge under the stated plan.",
"checks": {
"wash": {
"id": "wash",
"status": "pass",
"summary": "No wash flags; payment evidence present."
},
"price": {
"id": "price",
"status": "pass",
"summary": "Challenge price $0.03 ≤ max $0.05."
},
"lookalike": {
"id": "lookalike",
"status": "pass",
"summary": "Resource host matches planned domain."
},
"sanctions": {
"id": "sanctions",
"status": "pass",
"summary": "No OFAC SDN match for payTo (screen only, not a clearance)."
},
"url_safety": {
"id": "url_safety",
"status": "pass",
"summary": "Resource URL is https, no credentials, no IP literal."
},
"labs_lookup": {
"id": "labs_lookup",
"status": "pass",
"summary": "LMX Labs extra signal: paid + healthy."
},
"listed_price": {
"id": "listed_price",
"status": "pass",
"summary": "Challenge price within listed range."
},
"asset_network": {
"id": "asset_network",
"status": "pass",
"summary": "Asset/network OK (USDC on eip155:8453)."
},
"wallet_domain": {
"id": "wallet_domain",
"status": "pass",
"summary": "payTo matches the domain’s verified Agentropolis wallet."
}
},
"reasons": [],
"verdict": "allow",
"coverage": {
"notes": [],
"agentropolis": "full"
},
"check_version": "pay-guard-0.2.2"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"max_price_usd"
],
"properties": {
"asset": {
"type": "string",
"default": "USDC"
},
"payTo": {
"type": "string",
"description": "Shortcut: challenge.payTo at top level."
},
"amount": {
"type": "string"
},
"domain": {
"type": "string",
"description": "Planned seller domain / host the agent intends to pay."
},
"network": {
"type": "string",
"default": "eip155:8453"
},
"challenge": {
"type": "object",
"required": [
"payTo",
"amount"
],
"properties": {
"asset": {
"type": "string"
},
"payTo": {
"type": "string"
},
"amount": {
"type": "string",
"description": "Atomic USDC units (6 decimals), e.g. \"10000\" = $0.01."
},
"network": {
"type": "string"
},
"resource": {
"type": "string",
"description": "HTTPS resource URL from the 402."
}
},
"description": "The x402 402 challenge / accept entry the agent received."
},
"requestKey": {
"type": "string",
"maxLength": 128
},
"max_price_usd": {
"type": "number",
"minimum": 0,
"description": "Hard cap the agent will not exceed (USD)."
},
"listed_price_usd": {
"type": "number",
"minimum": 0,
"description": "Optional expected listed price from the agent’s plan."
}
},
"additionalProperties": true
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"verdict",
"reasons",
"checks"
],
"properties": {
"advice": {
"type": "string"
},
"checks": {
"type": "object"
},
"reasons": {
"type": "array",
"items": {
"type": "string"
}
},
"verdict": {
"enum": [
"allow",
"warn",
"block"
],
"type": "string"
},
"coverage": {
"type": "object"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
93/100 Solid
#12 of 222 in AI. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 100% uptime since 11-11
- Compliance
- A 14/14 checks pass
- Price
- $0.01 to $0.05 p53 in AI
- Risk
- clean no risk flag
- Traction
- ---
14/14 compliance checks
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
402 terms unchanged since 2026-11-11. Last up 2026-11-11.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 100% uptime, latest daily rollup (no 30d window yet), 787ms response p95, x402 compliance 14 of 14, $0.01 price against the category. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
It is a score inside AI, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 222 listings, this one among them: the same 222 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
All measured facts
What it does
Search engine for 52,000+ MCP servers, x402/MPP paid APIs and A2A agents, ranked by wash-filtered on-chain usage, plus first-party x402 kits (token honeypot/preflight, trade preflight, pay-guard, and more) payable in USDC on Base. Non-custodial pass-through relay; buyers pay sellers directly.
Agentropolis is a listed x402 AI API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-10-13 to 2026-11-11 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · AI
- uptime · latest daily rollup
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 787ms
- avg response
- 787ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.01
- price (max)
- $0.05
- category percentile (min)
- p53 in AI
- category percentile (max)
- p47 in AI
- endpoints / prices
- 5 / 4
- model
- tiered
- stability
- 100%
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
On-chain traction has not been assessed for this service yet.
- member since
- 2026-11-11
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 907ms | 5 | |
| Online | 402 | 857ms | 5 | |
| Online | 402 | 237ms | 5 | |
| Online | 402 | 729ms | 5 | |
| Online | 402 | 721ms | 5 | |
| Online | 402 | 787ms | 5 |
Changes0 in 30d
No changes recorded in the last 30 days.
Over time
On-chain volume
On-chain traction has not been assessed for this service yet.
Uptime no completed-day data
- Uptime
- no completed-day data
On-chain traction has not been assessed for this service yet.
More charts
Response time daily average, ms min 618ms, avg 618ms, max 618ms
10-13 to 11-11* UTC
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|
| 2026-11-11* | 100% | 618.50ms | 14/14 | p53 | 6/6 |
Alternatives in AI
5 of 221 other ranked services in AI, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.
Verify this service ($0.25)Embed a badge
HTML
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Markdown
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HTML, live uptime variant
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Delisting
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