x402.fiasignals.com
0.005 USDC /token-safety/lite check for Base/EVM swap agents: pay with x402 on Base USDC and get a compact proceed/caution/block verdict before signing or routing a swap.
SearchLiveeip155:8453Exactvia cdp
Calls · 30d
1↓ 7.1%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$4.03
Verified settled volume
45 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-30 15:54Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853FThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"flow": [
"Read accepts[0] from this JSON body or from the payment-required header.",
"Create the full x402 payment payload for accepts[0] with an x402-capable wallet/client.",
"Retry the same request with header X-PAYMENT: <full-x402-payment-payload> or PAYMENT-SIGNATURE: <full-x402-payment-payload>. Do not send a bare wallet signature.",
"Treat a 200 JSON response as the paid result; keep the response proof for reconciliation."
],
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
"amount": "500000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"examples": {
"typescript_x402_fetch": "import { wrapFetchWithPayment } from \"@x402/fetch\";\nconst fetchWithPayment = wrapFetchWithPayment(fetch, walletClient);\nconst res = await fetchWithPayment(\"https://x402.fiasignals.com/token-safety/batch\");\nconst json = await res.json();",
"curl_placeholder_retry": "curl -H \"X-PAYMENT: $X402_PAYMENT_HEADER\" \"https://x402.fiasignals.com/token-safety/batch\""
},
"resource": {
"url": "https://x402.fiasignals.com/token-safety/batch",
"mimeType": "application/json",
"description": "Fia Signals x402 Base USDC token safety and smart contract risk batch API for buyer agents, trading bots, swap routers, and A2A commerce. Screen up to 5 Base/EVM contracts before a swap for contract risk, rugpull, honeypot, liquidity, and market risk. Returns safe/risky/blocked verdicts, scores, warnings, GoPlus and DexScreener evidence, aggregate counts, and a non-breaking 0.50 USDC bundled-risk-pack payable tier in one paid pre-swap call."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
}
},
"output": {
"type": "json",
"example": {
"chain": "base",
"count": 2,
"limit": 5,
"results": [
{
"action": "PROCEED",
"sources": [
"GoPlus",
"DexScreener"
],
"verdict": "safe",
"confidence": "medium",
"safety_score": 90
}
],
"summary": {
"safe": 2,
"error": 0,
"risky": 0,
"blocked": 0
}
}
},
"upsell": {
"id": "bundled-risk-pack",
"name": "Fia Signals Bundled Risk Pack",
"status": "payable_x402_route_live",
"delivers": [
"combined token safety and smart contract risk summary",
"up to 5 Base/EVM contracts from the existing batch payload",
"ranked proceed/caution/reject queue",
"aggregate blocker reasons and warnings",
"buyer-facing next-action memo for swap routers",
"strict proof fields for revenue reconciliation"
],
"price_usdc": "0.50",
"truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
"payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
"starter_routes": [
"https://x402.fiasignals.com/token-safety/batch",
"https://x402.fiasignals.com/contract-risk/batch"
],
"amount_raw_usdc": "500000",
"payable_methods": [
"GET",
"POST"
],
"accepts_ordering": "starter_first_bundle_second",
"non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
"target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
"starter_accepts_index": 0,
"preferred_accepts_index": 1,
"starter_amount_raw_usdc": "30000",
"preferred_selection_hint": "Repeat or bundle buyers should select accepts[1] at 500000 raw USDC, or pay the distinct bundled-risk-pack route. accepts[0] remains the 30000 raw USDC starter.",
"preferred_amount_raw_usdc": "500000",
"recommended_for_repeat_buyers": true
},
"dedup_alert_discipline": {
"rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
"suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
"fallback_key": "endpoint+buyer+timestamp+amount when tx_ref is missing"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"token_addresses"
],
"properties": {
"chain": {
"type": "string",
"default": "base"
},
"token_addresses": {
"type": "string",
"description": "Comma-separated EVM token addresses, maximum 5."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type",
"example"
],
"properties": {
"chain": {
"type": "string"
},
"count": {
"type": "integer",
"maximum": 5,
"minimum": 1
},
"limit": {
"type": "integer",
"const": 5
},
"results": {
"type": "array",
"items": {
"type": "object",
"properties": {
"action": {
"type": "string"
},
"reasons": {
"type": "array",
"items": {
"type": "string"
}
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
},
"verdict": {
"enum": [
"safe",
"risky",
"blocked",
"error"
],
"type": "string"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
},
"confidence": {
"type": "string"
},
"raw_checks": {
"type": "object"
},
"safety_score": {
"type": "integer",
"maximum": 100,
"minimum": 0
}
}
}
},
"summary": {
"type": "object",
"properties": {
"safe": {
"type": "integer"
},
"error": {
"type": "integer"
},
"risky": {
"type": "integer"
},
"blocked": {
"type": "integer"
}
}
}
}
}
}
}
}
},
"quickstart": "https://x402.fiasignals.com/quickstart.json",
"x402Version": 2,
"compact_flow": [
"Read accepts[0] from this JSON body or from the payment-required header.",
"Create the full x402 payment payload for accepts[0] with an x402-capable wallet/client.",
"Retry the same request with header X-PAYMENT: <full-x402-payment-payload> or PAYMENT-SIGNATURE: <full-x402-payment-payload>. Do not send a bare wallet signature.",
"Treat a 200 JSON response as the paid result; keep the response proof for reconciliation."
],
"truth_status": "payment_instructions_only_no_settlement_attempted",
"retry_headers": [
"X-PAYMENT",
"PAYMENT-SIGNATURE"
],
"client_next_step": "HTTP 402 is the expected x402 challenge. Do not stop here: use an x402-capable wallet/client to create the full x402 payment payload, then retry the same method and URL with X-PAYMENT or PAYMENT-SIGNATURE. Do not send a bare wallet signature.",
"typescript_fetch": "import { wrapFetchWithPayment } from \"@x402/fetch\";\nconst fetchWithPayment = wrapFetchWithPayment(fetch, walletClient);\nconst res = await fetchWithPayment(\"https://x402.fiasignals.com/token-safety/batch\");\nconst json = await res.json();",
"header_value_rule": "X-PAYMENT and PAYMENT-SIGNATURE must contain the full x402 payment payload, not a bare wallet signature.",
"manual_header_flow": "curl -H \"X-PAYMENT: $X402_PAYMENT_HEADER\" \"https://x402.fiasignals.com/token-safety/batch\"",
"payment_challenge_headers": [
"payment-required",
"x-payment-required",
"x-payment-requirements"
]
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.03USDC≈ $0.03 USD
on Base · exact scheme
Pay 0.03 USDC on Base to 0x8D32…a853F. The signed payment is good for 5 minutes.
- Paid to
- 0x8D32…a853F
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 30000 smallest units
0.5USDC≈ $0.5 USD
on Base · exact scheme
Pay 0.5 USDC on Base to 0x8D32…a853F. The signed payment is good for 5 minutes.
- Paid to
- 0x8D32…a853F
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 500000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
"amount": "500000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"tags": [
"token safety",
"pre-trade risk",
"safe swap preflight",
"rugpull",
"honeypot",
"Base"
],
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
}
},
"output": {
"type": "json",
"example": {
"chain": "base",
"count": 2,
"limit": 5,
"results": [
{
"action": "PROCEED",
"sources": [
"GoPlus",
"DexScreener"
],
"verdict": "safe",
"confidence": "medium",
"safety_score": 90
}
],
"summary": {
"safe": 2,
"error": 0,
"risky": 0,
"blocked": 0
}
}
},
"upsell": {
"id": "bundled-risk-pack",
"name": "Fia Signals Bundled Risk Pack",
"status": "payable_x402_route_live",
"delivers": [
"combined token safety and smart contract risk summary",
"up to 5 Base/EVM contracts from the existing batch payload",
"ranked proceed/caution/reject queue",
"aggregate blocker reasons and warnings",
"buyer-facing next-action memo for swap routers",
"strict proof fields for revenue reconciliation"
],
"price_usdc": "0.50",
"buyer_action": "Use this as the next paid step after any /token-safety, /token-safety/batch, /pre-trade-risk, or /pre-trade-risk/batch hit. Do not buy another isolated starter check when the agent needs a ranked swap decision packet.",
"truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
"payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
"starter_routes": [
"https://x402.fiasignals.com/token-safety/batch",
"https://x402.fiasignals.com/contract-risk/batch"
],
"amount_raw_usdc": "500000",
"payable_methods": [
"GET",
"POST"
],
"accepts_ordering": "starter_first_bundle_second",
"non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
"target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
"starter_accepts_index": 0,
"preferred_accepts_index": 1,
"starter_amount_raw_usdc": "30000",
"preferred_selection_hint": "Starter buyers can use accepts[0] at 30000 raw USDC. Repeat buyers, multi-token buyers, and agents that already know they need a combined risk memo should select accepts[1] at 500000 raw USDC or pay the distinct bundled-risk-pack route; accepts[0] remains the 30000 raw USDC starter.",
"preferred_amount_raw_usdc": "500000",
"recommended_for_repeat_buyers": true
},
"iconUrl": "https://x402.fiasignals.com/favicon.ico",
"serviceName": "Fia Signals Token Safety Batch",
"dedup_alert_discipline": {
"rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
"watcher": "tools/x402_bundle_watch.py",
"suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
"fallback_key": "payment_proof_fingerprint, then endpoint+buyer+amount+timestamp_bucket when tx_ref is missing",
"dedupe_priority": [
"tx_ref",
"payment_proof_fingerprint",
"endpoint+buyer+amount+timestamp_bucket"
]
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"token_addresses"
],
"properties": {
"chain": {
"type": "string",
"default": "base"
},
"token_addresses": {
"type": "string",
"description": "Comma-separated EVM token addresses, maximum 5."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type",
"example"
],
"properties": {
"chain": {
"type": "string"
},
"count": {
"type": "integer",
"maximum": 5,
"minimum": 1
},
"limit": {
"type": "integer",
"const": 5
},
"results": {
"type": "array",
"items": {
"type": "object",
"properties": {
"action": {
"type": "string"
},
"reasons": {
"type": "array",
"items": {
"type": "string"
}
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
},
"verdict": {
"enum": [
"safe",
"risky",
"blocked",
"error"
],
"type": "string"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
},
"confidence": {
"type": "string"
},
"raw_checks": {
"type": "object"
},
"safety_score": {
"type": "integer",
"maximum": 100,
"minimum": 0
}
}
}
},
"summary": {
"type": "object",
"properties": {
"safe": {
"type": "integer"
},
"error": {
"type": "integer"
},
"risky": {
"type": "integer"
},
"blocked": {
"type": "integer"
}
}
}
}
}
}
},
"category": "finance",
"description": "Base/EVM batch token safety, smart-contract risk, rugpull and honeypot pre-swap verdict for up to 5 contracts. Returns PROCEED, CAUTION or REJECT with safety scores, warnings, source evidence, aggregate counts and no-execution flags.",
"discoverable": true
}
}Provenance
- Seen in the source catalog
- 2026-08-30 15:54Z
- Last indexed by Roundhouse
- 2026-09-24 13:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-14 10:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service x402.fiasignals.com and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402.fiasignals.com' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402.fiasignals.com/token-safety/batch, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.