{
  "x402Version": 2,
  "id": 534,
  "slug": "534",
  "resource": "https://api.oblique.markets/api/v1/paid/b402-preflight",
  "description": "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.",
  "type": "http",
  "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
    }
  ],
  "outputSchema": {
    "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"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.oblique.markets",
  "lastUpdated": "2026-09-14T18:45:05.98Z",
  "quality": {
    "calls30d": 9,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-09-14T18:45:05.796Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.oblique.markets",
    "manifest_name": "api.oblique.markets",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}