Sends a request to a web address you provide and reports back everything the ser
Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how many times it got redirected, and how long the whole thing took.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://http-header-checker.underscoredone.com/check
| Category | Code and developer |
|---|---|
| Provider host | http-header-checker.underscoredone.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"follow_redirects": true,
"method": "GET",
"url": "https://example.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"follow_redirects": {
"description": "Whether to follow redirects to their final destination or stop at the first one",
"type": "boolean"
},
"method": {
"description": "Either GET or HEAD; GET fetches the page normally, HEAD only asks for headers without the body",
"type": "string"
},
"url": {
"description": "The full web address to check, including http:// or https://",
"type": "string"
}
},
"required": [
"url"
],
"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": {
"example": {
"properties": {
"api_version": {
"type": "string"
},
"final_url": {
"type": "string"
},
"headers": {
"additionalProperties": true,
"type": "object"
},
"missing_security_headers": {
"items": {
"type": "string"
},
"type": "array"
},
"redirect_chain": {
"items": {
"type": "object"
},
"type": "array"
},
"response_time_ms": {
"type": "integer"
},
"status_code": {
"type": "integer"
},
"url": {
"type": "string"
}
},
"required": [
"api_version",
"url",
"final_url",
"status_code",
"redirect_chain",
"headers",
"missing_security_headers",
"response_time_ms"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}