Agent Service · x402 · early usage

Trace an HTTP redirect chain to its final destination without downloading page bodies

Trace an HTTP redirect chain to its final destination without downloading page bodies. Returns every hop (URL + status), the final URL, and safety warnings — link-safety grounding for agents before they visit or cite a URL. Clean JSON.

by unwrap.use.x402atlas.com · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls12

30d payers8

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Tags: url · redirect · unwrap · unshorten · link-safety · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "url": "https://bit.ly/example"
}

Output example

{
  "final_url": "https://example.com/landing",
  "hops": [
    {
      "location": "https://t.co/abcd",
      "status_code": 301,
      "url": "https://bit.ly/example"
    },
    {
      "location": "https://example.com/landing",
      "status_code": 302,
      "url": "https://t.co/abcd"
    },
    {
      "status_code": 200,
      "url": "https://example.com/landing"
    }
  ],
  "queried_at": "2026-07-03T12:00:00Z",
  "redirect_count": 2,
  "redirected": true,
  "status_code": 200,
  "url": "https://bit.ly/example",
  "warnings": []
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/26797.json for the price and payment options.
Pay. Call GET https://unwrap.use.x402atlas.com/. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Polygon, Arbitrum One, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.009 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon, Arbitrum One, Solana
Demand: 12 calls · 8 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.009	0x492eC81ECf395FbEa2F19fECe203ee14D0544B71	300s
exact	Polygon eip155:137	USDC	$0.009	0x492eC81ECf395FbEa2F19fECe203ee14D0544B71	300s
exact	Arbitrum One eip155:42161	USDC	$0.009	0x492eC81ECf395FbEa2F19fECe203ee14D0544B71	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.009	ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x492eC81ECf395FbEa2F19fECe203ee14D0544B71",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "9000",
    "amountUsd": 0.009,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x492eC81ECf395FbEa2F19fECe203ee14D0544B71",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "9000",
    "amountUsd": 0.009,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x492eC81ECf395FbEa2F19fECe203ee14D0544B71",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "9000",
    "amountUsd": 0.009,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "9000",
    "amountUsd": 0.009,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "final_url": {
          "description": "The last URL reached in the redirect chain",
          "type": "string"
        },
        "hops": {
          "description": "Every HEAD request made, in order",
          "items": {
            "properties": {
              "location": {
                "description": "Location header value, if any",
                "type": "string"
              },
              "status_code": {
                "type": "integer"
              },
              "url": {
                "type": "string"
              }
            },
            "required": [
              "url",
              "status_code"
            ],
            "type": "object"
          },
          "type": "array"
        },
        "queried_at": {
          "description": "UTC timestamp the trace was performed",
          "format": "date-time",
          "type": "string"
        },
        "redirect_count": {
          "description": "Number of 3xx hops followed",
          "type": "integer"
        },
        "redirected": {
          "description": "Whether any redirect was followed",
          "type": "boolean"
        },
        "status_code": {
          "description": "HTTP status code of the final hop",
          "type": "integer"
        },
        "url": {
          "description": "The input URL as parsed",
          "type": "string"
        },
        "warnings": {
          "description": "Advisory notes: hop-cap truncation, redirect loops, missing Location, https→http downgrade, or a blocked redirect target",
          "items": {
            "type": "string"
          },
          "type": "array"
        }
      },
      "required": [
        "url",
        "final_url",
        "status_code",
        "redirect_count",
        "redirected",
        "hops",
        "warnings",
        "queried_at"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "final_url": "string",
    "hops": [
      {
        "location": "string",
        "status_code": 0,
        "url": "string"
      }
    ],
    "queried_at": "2026-01-01T00:00:00Z",
    "redirect_count": 0,
    "redirected": true,
    "status_code": 0,
    "url": "string",
    "warnings": [
      "string"
    ]
  },
  "type": "string"
}

Examples

curl

curl -X GET 'https://unwrap.use.x402atlas.com/'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://unwrap.use.x402atlas.com/", {
  "method": "GET"
});
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.request("GET", "https://unwrap.use.x402atlas.com/")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: unwrap.use.x402atlas.com
Endpoint: https://unwrap.use.x402atlas.com/
Machine-readable: /resources/26797.json