Use when an agent needs b402 preflight
Use when an agent needs b402 preflight. Returns Validate BNB/B402 payment intent freshness, recipient, amount, deadline, fee cap, public BNB balance, and recent activity without custody or payment relay. $0.01.
10000 (raw units)
price
9
calls / 30d
3
unique payers
2026-09-14
updated
Provider
api.oblique.markets · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x970007590aCC5C938cd51345B17AF51B1B40D3Ab",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 60
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "GYyTRmt317JafPHXPnM54Fsvsma5GnS9wm6qGMqaykdS",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"maxTimeoutSeconds": 60
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"amount": "example",
"asset": "native/BNB or a BEP-20 contract address",
"chain": "bnb",
"deadline": "example",
"fee_cap": "Maximum network fee in BNB",
"intent_id": "example",
"payer": "example",
"recipient": "example"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"amount": "0.01",
"amount_units": "10000000000000000",
"asset": "BNB",
"asset_balance": "0.125",
"chain": "eip155:56",
"decision": "ready",
"evidence_hash": "sha256:4e8f1a2c6d8b0f2e4a6c8e0f2a4c6e8f0a2c4e6f8a0b2c4d6e8f0a2c4e6f8a0b2",
"evidence_source": "public_bsc_rpc",
"fee_cap_bnb": "0.0005",
"fee_cap_sufficient": true,
"fee_headroom_bnb": "0.1245",
"intent_hash": "sha256:9c2d7b3f6e1a4c8b0d2e5f7a9b1c3d5e7f9a1b3c5d7e9f1a3b5c7d9e1f3a5b7c9",
"intent_id": "invoice-2026-08-21-001",
"payer": "0x1111111111111111111111111111111111111111",
"recent_activity": {
"incoming_transfer_count": 5,
"latest_block": 61500000,
"lookback_blocks": 2000,
"nonce": 42,
"outgoing_transfer_count": 3
},
"recipient": "0x2222222222222222222222222222222222222222",
"recipient_valid": true,
"signature": "hmac-sha256:7a4e1c9b3d5f7a9c1e3b5d7f9a1c3e5b7d9f1a3c5e7b9d1f3a5c7e9b1d3f5a7",
"signing_key_id": "b402-preflight-v1",
"timestamp": "2026-08-21T20:00:00.000Z"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"amount": {
"type": "string"
},
"asset": {
"description": "native/BNB or a BEP-20 contract address",
"type": "string"
},
"chain": {
"enum": [
"bnb",
"bnb-smart-chain",
"eip155:56",
"56"
],
"type": "string"
},
"deadline": {
"description": "ISO-8601 timestamp or Unix seconds"
},
"fee_cap": {
"description": "Maximum network fee in BNB",
"type": "string"
},
"intent_id": {
"type": "string"
},
"payer": {
"type": "string"
},
"recipient": {
"type": "string"
}
},
"required": [
"payer",
"recipient",
"asset",
"amount",
"chain",
"deadline",
"fee_cap",
"intent_id"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"amount": {
"type": "string"
},
"amount_units": {
"type": "string"
},
"asset": {
"type": "string"
},
"asset_balance": {
"type": "string"
},
"chain": {
"type": "string"
},
"decision": {
"type": "string"
},
"evidence_hash": {
"type": "string"
},
"evidence_source": {
"type": "string"
},
"fee_cap_bnb": {
"type": "string"
},
"fee_cap_sufficient": {
"type": "boolean"
},
"fee_headroom_bnb": {
"type": "string"
},
"intent_hash": {
"type": "string"
},
"intent_id": {
"type": "string"
},
"payer": {
"type": "string"
},
"recent_activity": {
"properties": {
"incoming_transfer_count": {
"type": "integer"
},
"latest_block": {
"type": "integer"
},
"lookback_blocks": {
"type": "integer"
},
"nonce": {
"type": "integer"
},
"outgoing_transfer_count": {
"type": "integer"
}
},
"type": "object"
},
"recipient": {
"type": "string"
},
"recipient_valid": {
"type": "boolean"
},
"signature": {
"type": "string"
},
"signing_key_id": {
"type": "string"
},
"timestamp": {
"type": "string"
}
},
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://api.oblique.markets/api/v1/paid/b402-preflight" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.oblique.markets/api/v1/paid/b402-preflight");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://api.oblique.markets/api/v1/paid/b402-preflight")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/534.json, and this resource appears in /discovery/resources and /discovery/search.