x402 Live Probe

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required: $0.005 USDC for util_x402_live_probe",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "app": "Delx Commerce",
        "name": "USD Coin",
        "version": "2",
        "provider": "coinbase",
        "erc8004_id": "14340",
        "accept_label": "Coinbase CDP",
        "provider_label": "Coinbase CDP",
        "facilitator_url": "https://api.cdp.coinbase.com/platform/v2/x402"
      },
      "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.delx.ai/api/v1/x402/live-probe",
      "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
      "inputSchema": {
        "type": "object",
        "required": [
          "url"
        ],
        "properties": {
          "url": {
            "type": "string",
            "maxLength": 2048,
            "minLength": 12,
            "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
          },
          "capability": {
            "type": "string",
            "maxLength": 120,
            "minLength": 1,
            "description": "Optional capability tag stored on the observation receipt for later directory queries."
          }
        },
        "additionalProperties": false
      },
      "outputSchema": {
        "type": "object",
        "description": "Bounded trust-layer JSON; no secrets, no chain fetch, no remote execution."
      },
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "app": "Delx Commerce",
        "name": "USD Coin",
        "version": "2",
        "provider": "payai",
        "erc8004_id": "14340",
        "accept_label": "PayAI Base",
        "provider_label": "PayAI Base",
        "facilitator_url": "https://facilitator.payai.network"
      },
      "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.delx.ai/api/v1/x402/live-probe",
      "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
      "inputSchema": {
        "type": "object",
        "required": [
          "url"
        ],
        "properties": {
          "url": {
            "type": "string",
            "maxLength": 2048,
            "minLength": 12,
            "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
          },
          "capability": {
            "type": "string",
            "maxLength": 120,
            "minLength": 1,
            "description": "Optional capability tag stored on the observation receipt for later directory queries."
          }
        },
        "additionalProperties": false
      },
      "outputSchema": {
        "type": "object",
        "description": "Bounded trust-layer JSON; no secrets, no chain fetch, no remote execution."
      },
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "app": "Delx Commerce",
        "name": "USD Coin",
        "version": "2",
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww",
        "provider": "payai",
        "erc8004_id": "14340",
        "accept_label": "PayAI Solana",
        "provider_label": "PayAI Solana",
        "facilitator_url": "https://facilitator.payai.network"
      },
      "payTo": "28heAMpFkeUJsL7o7apiK4oJwZWq2fUHinRwbgYYsemG",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "mimeType": "application/json",
      "resource": "https://api.delx.ai/api/v1/x402/live-probe",
      "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
      "inputSchema": {
        "type": "object",
        "required": [
          "url"
        ],
        "properties": {
          "url": {
            "type": "string",
            "maxLength": 2048,
            "minLength": 12,
            "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
          },
          "capability": {
            "type": "string",
            "maxLength": 120,
            "minLength": 1,
            "description": "Optional capability tag stored on the observation receipt for later directory queries."
          }
        },
        "additionalProperties": false
      },
      "outputSchema": {
        "type": "object",
        "description": "Bounded trust-layer JSON; no secrets, no chain fetch, no remote execution."
      },
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.delx.ai/api/v1/x402/live-probe",
    "tags": [
      "x402",
      "commerce",
      "trust",
      "probe-before-you-pay"
    ],
    "iconUrl": "https://delx.ai/opengraph-image?v=20260305-fox",
    "mimeType": "application/json",
    "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
    "serviceName": "x402 Live Probe"
  },
  "extensions": {
    "delx": {
      "docs": {
        "pricing": "https://delx.ai/docs/pricing",
        "mpp_setup": "https://delx.ai/docs/mpp-setup",
        "ows_setup": "https://delx.ai/docs/ows-setup",
        "x402_setup": "https://delx.ai/docs/x402-setup",
        "tools_catalog": "https://api.delx.ai/api/v1/tools",
        "monetization_policy": "https://api.delx.ai/api/v1/monetization-policy",
        "x402_capability_probe": "https://api.delx.ai/api/v1/x402-capability?agent_id=<AGENT_ID>"
      },
      "orbit": {
        "use": "Spend vested OC now: 100 OC = 0.001 USDC; cover up to 20% of an eligible call.",
        "docs": "https://commerce.delx.ai/orbit.md",
        "note": "Earn OC on verified paid calls. Utility rebate, not yield.",
        "spec": "https://commerce.delx.ai/orbit.json",
        "claim": "POST /api/v1/rewards/wallet-nonce then /api/v1/rewards/bind-wallet",
        "redeem": "POST /api/v1/orbit/vouchers",
        "status": "https://api.delx.ai/api/v1/orbit/status",
        "program": "delx-orbit-season-0",
        "cashback": "eligible"
      },
      "method": "POST",
      "docs_url": "https://delx.ai/docs/x402-setup",
      "agentcash": {
        "fetch": "npx agentcash@latest fetch <paid-resource-url> -m POST -H 'content-type: application/json' -b '<same-json-body>' --payment-protocol x402 --max-amount <published-price> -y",
        "balance": "npx agentcash@latest balance",
        "onboard": "https://agentcash.dev/onboard?r=REF-3KE2-22D3-XJBM-SGAR",
        "accounts": "npx agentcash@latest accounts",
        "discover": "npx agentcash@latest discover https://api.delx.ai",
        "bonus_note": "If eligible, start from the Delx AgentCash onboarding link before funding the wallet.",
        "solana_note": "PayAI is the advertised fee payer for Delx Solana accepts, so the buyer needs USDC on Solana but does not need SOL for the network fee.",
        "fetch_by_network": {
          "base": "npx agentcash@latest fetch <paid-resource-url> -m POST -H 'content-type: application/json' -b '<same-json-body>' --payment-protocol x402 --payment-network base --max-amount <published-price> -y",
          "solana": "npx agentcash@latest fetch <paid-resource-url> -m POST -H 'content-type: application/json' -b '<same-json-body>' --payment-protocol x402 --payment-network solana --max-amount <published-price> -y"
        }
      },
      "tool_name": "util_x402_live_probe",
      "next_steps": [
        "Read accepts[] and choose the payment provider that matches your controller policy.",
        "Create/sign payment proof for the selected accepts[] amount and retry the same request with PAYMENT-SIGNATURE.",
        "If your REST client speaks MPP, reuse the same request body and retry with Authorization: Payment <credential> after the WWW-Authenticate challenge.",
        "If you choose a non-default provider, send x-payment-provider on the retry to pin routing explicitly.",
        "When the same provider appears on multiple networks, choose the exact accepts[] entry by network + asset before signing.",
        "Keep reading prices from /api/v1/tools (do not hardcode).",
        "If you need an AgentCash wallet first, open agentcash.onboard and complete onboarding before retrying the paid call.",
        "If your agent does not support x402 yet, use AgentCash for the paid retry or route to free_alternatives[] and stay on Delx's free path."
      ],
      "reason_code": "payment_required",
      "sample_input": {
        "url": "https://api.example-x402.test/pay"
      },
      "sample_output": {
        "url": "https://api.example-x402.test/pay",
        "kind": "x402_live_probe",
        "paid": false,
        "latency_ms": 42,
        "receipt_id": "0000000000000000000000000000000000000000000000000000000000000000",
        "http_status": 402,
        "observed_at": "2026-08-14T19:00:00+00:00"
      },
      "free_alternative": {
        "tool": "quick_operational_recovery",
        "price_usdc": "0",
        "schema_url": "https://api.delx.ai/api/v1/tools/schema/quick_operational_recovery",
        "description": "Free one-call recovery bootstrap.",
        "x402_required": false
      },
      "header_shortcuts": {},
      "runtime_examples": {
        "a2a_retry": "curl -X POST https://api.delx.ai/v1/a2a -H 'Content-Type: application/json' -H 'PAYMENT-SIGNATURE: <SIGNED_PAYMENT>' -d '<same-jsonrpc-payload>'",
        "mcp_retry": "curl -X POST https://api.delx.ai/v1/mcp -H 'Content-Type: application/json' -H 'PAYMENT-SIGNATURE: <SIGNED_PAYMENT>' -d '<same-jsonrpc-payload>'",
        "rest_retry": "curl -X POST <paid-resource-url> -H 'Content-Type: application/json' -H 'PAYMENT-SIGNATURE: <SIGNED_PAYMENT>' -d '<same-json-body>'",
        "rest_retry_mpp": "curl -X POST <paid-resource-url> -H 'Content-Type: application/json' -H 'Authorization: Payment <MPP_CREDENTIAL>' -d '<same-json-body>'"
      },
      "validation_error": {
        "docs": {
          "pricing": "https://delx.ai/docs/pricing",
          "x402_setup": "https://delx.ai/docs/x402-setup"
        },
        "hint": "Pass the required premium tool input before retrying.",
        "error": "missing required parameter(s): url",
        "examples": {},
        "required": [
          "url"
        ],
        "tool_name": "util_x402_live_probe",
        "accepted_inputs": {
          "agent_id": {
            "body": [
              "agent_id",
              "agentId"
            ],
            "query": [
              "agent_id",
              "agentId"
            ],
            "headers": [
              "x-delx-agent-id",
              "x-agent-id",
              "x-openclaw-agent-id"
            ]
          }
        }
      },
      "free_alternatives": [
        {
          "tool": "quick_operational_recovery",
          "price_usdc": "0",
          "schema_url": "https://api.delx.ai/api/v1/tools/schema/quick_operational_recovery",
          "description": "Free one-call recovery bootstrap.",
          "x402_required": false
        },
        {
          "tool": "process_failure",
          "price_usdc": "0",
          "schema_url": "https://api.delx.ai/api/v1/tools/schema/process_failure",
          "description": "Free failure analysis and typed recovery direction.",
          "x402_required": false
        },
        {
          "tool": "monitor_heartbeat_sync",
          "price_usdc": "0",
          "schema_url": "https://api.delx.ai/api/v1/tools/schema/monitor_heartbeat_sync",
          "description": "Free heartbeat sync for current health and reliability state.",
          "x402_required": false
        }
      ],
      "primary_followups": []
    },
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "url": "https://api.example-x402.test/pay"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "url": "https://api.example-x402.test/pay",
            "kind": "x402_live_probe",
            "paid": false,
            "latency_ms": 42,
            "receipt_id": "0000000000000000000000000000000000000000000000000000000000000000",
            "http_status": 402,
            "observed_at": "2026-08-14T19:00:00+00:00"
          }
        }
      },
      "tags": [
        "x402",
        "commerce",
        "trust",
        "probe-before-you-pay"
      ],
      "owner": "delx-commerce",
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input",
          "output"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "url"
                ],
                "properties": {
                  "url": {
                    "type": "string",
                    "maxLength": 2048,
                    "minLength": 12,
                    "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
                  },
                  "capability": {
                    "type": "string",
                    "maxLength": 120,
                    "minLength": 1,
                    "description": "Optional capability tag stored on the observation receipt for later directory queries."
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "type": "string",
                "const": "POST"
              },
              "bodyType": {
                "type": "string",
                "const": "json"
              }
            }
          },
          "output": {
            "type": "object",
            "description": "Bounded trust-layer JSON; no secrets, no chain fetch, no remote execution."
          }
        }
      },
      "iconUrl": "https://delx.ai/opengraph-image?v=20260305-fox",
      "summary": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contract at observation time — not future uptime or provider\nhonesty.\n",
      "category": "x402-trust",
      "featured": false,
      "provider": "coinbase",
      "tool_name": "util_x402_live_probe",
      "coverImage": "https://delx.ai/opengraph-image?v=20260305-fox",
      "risk_class": "advisory_observation",
      "suspension": null,
      "serviceName": "x402 Live Probe",
      "discoverable": true,
      "data_handling": "memory_only_no_retention",
      "demand_family": "x402_trust",
      "protocol_core": false,
      "quality_limit": "no payment is made, one endpoint per call, and a passing probe\nproves the contract at observation time — not future uptime or provider\nhonesty.",
      "refund_policy": {
        "queue": "commerce_refund_queue",
        "eligible_when": "paid_and_delivery_failed"
      },
      "target_p95_ms": 5000,
      "listing_status": "payment_verified_waiting_for_index",
      "execution_class": "first_party_bounded_observation",
      "indexed_publicly": false,
      "listing_blockers": [],
      "delivery_telemetry": {
        "failed": "commerce_delivery_failed",
        "started": "commerce_delivery_started",
        "succeeded": "commerce_delivery_succeeded"
      }
    },
    "payment-identifier": {
      "info": {
        "required": false
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "required"
        ],
        "properties": {
          "id": {
            "type": "string",
            "pattern": "^[a-zA-Z0-9_-]+$",
            "maxLength": 128,
            "minLength": 16
          },
          "required": {
            "type": "boolean"
          }
        }
      }
    }
  },
  "reason_code": "payment_required",
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "coinbase",
      "erc8004_id": "14340",
      "accept_label": "Coinbase CDP",
      "provider_label": "Coinbase CDP",
      "facilitator_url": "https://api.cdp.coinbase.com/platform/v2/x402"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/live-probe",
    "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Base",
      "provider_label": "PayAI Base",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/live-probe",
    "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Solana",
      "provider_label": "PayAI Solana",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "28heAMpFkeUJsL7o7apiK4oJwZWq2fUHinRwbgYYsemG",
    "amount": "5000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/live-probe",
    "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contr…",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "url": "https://api.example-x402.test/pay"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "url": "https://api.example-x402.test/pay",
          "kind": "x402_live_probe",
          "paid": false,
          "latency_ms": 42,
          "receipt_id": "0000000000000000000000000000000000000000000000000000000000000000",
          "http_status": 402,
          "observed_at": "2026-08-14T19:00:00+00:00"
        }
      }
    },
    "tags": [
      "x402",
      "commerce",
      "trust",
      "probe-before-you-pay"
    ],
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "url"
              ],
              "properties": {
                "url": {
                  "type": "string",
                  "maxLength": 2048,
                  "minLength": 12,
                  "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
                },
                "capability": {
                  "type": "string",
                  "maxLength": 120,
                  "minLength": 1,
                  "description": "Optional capability tag stored on the observation receipt for later directory queries."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "type": "string",
              "const": "POST"
            },
            "bodyType": {
              "type": "string",
              "const": "json"
            }
          }
        },
        "output": {
          "type": "object",
          "description": "Bounded trust-layer JSON; no secrets, no chain fetch, no remote execution."
        }
      }
    },
    "summary": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contract at observation time — not future uptime or provider\nhonesty.\n",
    "category": "x402-trust",
    "serviceName": "x402 Live Probe"
  }
}

Provenance

Seen in the source catalog

2026-08-18 19:19Z

Last indexed by Roundhouse

2026-09-17 19:20Z

Last enriched (probe, favicon, geo)

2026-09-23 03:45Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402