Developer Tool · x402 · early usage

Call this when an agent tracks GDACS disasters (see /v1/disaster-events) and needs what…

by wailand.tailf99551.ts.net · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls2

30d payers2

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

Call this when an agent tracks GDACS disasters (see /v1/disaster-events) and needs what changed since a date: alert-level moves, is_current flips with how long the previous state held, and events entering or leaving Orange/Red scope, each dated to the daily snapshot that first showed it. GDACS publishes episode lists free but never when anything changed; these dates are ours, from 2026-08-25. Orange/Red only. Not for life-safety. Filters: since (required), until, kind, event_type.

Tags: disaster · changes · gdacs · geo · open-data · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "kind": "alert_changed",
  "since": "2026-09-01"
}

Output example

{
  "data": [
    {
      "alert_level": "Orange",
      "alert_score": 2,
      "as_of": "2026-09-23",
      "country": "China",
      "current_state_since": "2026-09-22",
      "envelope_version": "disaster-changes-1.0",
      "episode_alert_level": "Green",
      "episode_alert_score": 0.5,
      "episode_id": "19",
      "episode_path": [
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 1
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 2
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 3
        },
        {
          "episode_alert_level": "Orange",
          "episode_alert_score": 1.5,
          "episode_id": 4
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 5
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 6
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 7
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 8
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 9
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 10
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 11
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 12
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 13
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 14
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 15
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 16
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 17
        },
        {
          "episode_alert_level": "Orange",
          "episode_alert_score": 1.5,
          "episode_id": 18
        },
        {
          "episode_alert_level": "Green",
          "episode_alert_score": 0.5,
          "episode_id": 19
        }
      ],
      "episodes_seen": 19,
      "escalated_at_episode": 4,
      "escalated_from": "Green",
      "event_type": "FL",
      "events": [
        {
          "alert_level": "Orange",
          "episode_id": "19",
          "episodes_before": 18,
          "escalated_at_episode": 4,
          "escalated_from": "Green",
          "is_current": true,
          "kind": "entered_scope",
          "observed_at": "2026-09-22",
          "prev_observed_at": "2026-09-20",
          "re_entry": true
        },
        {
          "direction": "de_escalation",
          "field": "episode_alert_level",
          "kind": "alert_changed",
          "new": "Green",
          "observed_at": "2026-09-22",
          "old": "Orange",
          "prev_observed_at": "2026-09-20"
        },
        {
          "episode_id": "18",
          "held_days": 5,
          "kind": "current_changed",
          "new": true,
          "observed_at": "2026-09-22",
          "old": false,
          "prev_observed_at": "2026-09-20"
        }
      ],
      "events_truncated": true,
      "first_seen": "2026-08-25",
      "from_date_iso": "2026-07-31",
      "is_current": true,
      "iso3": "CHN",
      "last_seen": "2026-09-23",
      "last_shard_date": "2026-09-23",
      "observations": 22,
      "present_in_latest": true,
      "report_url": "https://www.gdacs.org/report.aspx?eventid=1104081&episodeid=19&eventtype=FL",
      "scope_status": "in_scope",
      "severity": 0,
      "severity_text": "Magnitude 0",
      "severity_unit": "",
      "source": "gdacs",
      "source_id": "gdacs-FL-1104081",
      "title": "Flood in China",
      "to_date_iso": "2026-09-21"
    }
  ],
  "meta": {
    "as_of": {
      "gdacs": "2026-09-23"
    },
    "attribution": "Contains GDACS Global Disaster Alert and Coordination System data (European Commission Joint Research Centre / UN OCHA), reused under the Creative Commons Attribution 4.0 International (CC BY 4.0) licence per the European Commission legal notice and Decision 2011/833/EU. Data has been CHANGED: records are normalized, renamed and re-keyed by wAILand; field names and structure are not GDACS's own. GDACS services are not meant to substitute nor to override any official information or alert message, and should not be used for decision making without prior confirmation of their validity. Provided 'as is' without warranty. Not endorsed by GDACS, the European Union or the United Nations. Change events are derived by wAILand from its own daily snapshot archive.",
    "degraded": false,
    "license": "Internal use by the paying agent/operator; redistribution of substantial parts prohibited. Not for life-safety, emergency-response or evacuation decisions: confirm against the official GDACS report URL before acting.",
    "row_count": 1,
    "truncated": false
  }
}

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/35263.json for the price and payment options.
Pay. Call GET https://wailand.tailf99551.ts.net/v1/disaster-changes. 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, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x32E293A7fA946331B3eCd013cf0461Bf32C99A9d	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x32E293A7fA946331B3eCd013cf0461Bf32C99A9d",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://wailand.tailf99551.ts.net/v1/disaster-changes"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://wailand.tailf99551.ts.net/v1/disaster-changes");
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://wailand.tailf99551.ts.net/v1/disaster-changes")
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: wailand.tailf99551.ts.net
Endpoint: https://wailand.tailf99551.ts.net/v1/disaster-changes
Machine-readable: /resources/35263.json