Index onlineMerchant portal
Api Endpoint

nostr.halowerk.com

Three modes over the same event structure. In preimage mode the caller supplies a public key and the event fields; the answer holds the exact NIP-01 serialisation, the SHA-256 event id derived from it and the 32 bytes to sign, so the caller signs locally and no secret key ever crosses the connection.

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Offering

Provider
nostr.halowerk.com
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Security
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://nostr.halowerk.com/event-sign
MIME type
Not provided
First seen
2026-10-16T01:58:26.121Z
Last seen
Tags
None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E"
  }
]

Observed health

Status
Healthy
Latest latency
316 ms
Average latency
946 ms
HTTP status
204
Last checked
Reachability
100% over 10 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "additionalProperties": false,
      "properties": {
        "content": {
          "default": "",
          "description": "Event content.",
          "maxLength": 64000,
          "type": "string"
        },
        "created_at": {
          "description": "Unix seconds. Left out, the current time is used.",
          "minimum": 0,
          "type": "integer"
        },
        "event": {
          "description": "The complete event to check. Only used in verify mode.",
          "type": "object"
        },
        "kind": {
          "default": 1,
          "description": "NIP-01 event kind. 1 is a text note, 30023 a long-form article.",
          "maximum": 65535,
          "minimum": 0,
          "type": "integer"
        },
        "mode": {
          "default": "preimage",
          "description": "preimage: caller signs locally. ephemeral: single-use key generated here. verify: check a complete event.",
          "enum": [
            "preimage",
            "ephemeral",
            "verify"
          ],
          "type": "string"
        },
        "pubkey": {
          "description": "Public key as hex or npub. Required in preimage mode, ignored otherwise.",
          "type": "string"
        },
        "tags": {
          "description": "NIP-01 tags, each an array of strings, for example [\"t\",\"bitcoin\"].",
          "items": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "maxItems": 200,
          "type": "array"
        }
      },
      "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 schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "content": {
              "default": "",
              "description": "Event content.",
              "maxLength": 64000,
              "type": "string"
            },
            "created_at": {
              "description": "Unix seconds. Left out, the current time is used.",
              "minimum": 0,
              "type": "integer"
            },
            "event": {
              "description": "The complete event to check. Only used in verify mode.",
              "type": "object"
            },
            "kind": {
              "default": 1,
              "description": "NIP-01 event kind. 1 is a text note, 30023 a long-form article.",
              "maximum": 65535,
              "minimum": 0,
              "type": "integer"
            },
            "mode": {
              "default": "preimage",
              "description": "preimage: caller signs locally. ephemeral: single-use key generated here. verify: check a complete event.",
              "enum": [
                "preimage",
                "ephemeral",
                "verify"
              ],
              "type": "string"
            },
            "pubkey": {
              "description": "Public key as hex or npub. Required in preimage mode, ignored otherwise.",
              "type": "string"
            },
            "tags": {
              "description": "NIP-01 tags, each an array of strings, for example [\"t\",\"bitcoin\"].",
              "items": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "maxItems": 200,
              "type": "array"
            }
          },
          "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"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}