Inspect SSL/TLS certificate for any domain
Inspect SSL/TLS certificate for any domain. Returns valid boolean, days_remaining, issuer, valid_from, valid_to, subject_alt_names (SANs), fingerprint_sha256, and protocol version. Default port 443. Use for certificate expiry monitoring, security audits, or HTTPS verification.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
954 msmedian answer time
$0.009listed price per call
$0.009price 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://agentsvc.io/api/v1/proxy/ssl-check
| Category | Everything else |
|---|---|
| Provider host | agentsvc.io |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 11 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.009 | 954 ms |
Example input (from the provider)
{
"body": {
"domain": "github.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"domain": {
"description": "Domain to check SSL for (e.g. 'github.com', 'api.example.com'). Do not include https://",
"type": "string"
},
"port": {
"default": 443,
"description": "Port to check (default: 443)",
"type": "integer"
}
},
"required": [
"domain"
]
},
"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": {
"data": {
"properties": {
"days_remaining": {
"description": "Number of days until certificate expires (negative = already expired)",
"type": "integer"
},
"domain": {
"description": "The checked domain",
"type": "string"
},
"fingerprint_sha256": {
"description": "SHA-256 fingerprint of the certificate",
"type": "string"
},
"issuer": {
"description": "Certificate issuer organization",
"type": "string"
},
"port": {
"description": "The port that was checked",
"type": "integer"
},
"protocol": {
"description": "TLS protocol version in use (e.g. TLSv1.3)",
"type": "string"
},
"serial_number": {
"description": "Certificate serial number (hex)",
"type": "string"
},
"subject": {
"description": "Certificate subject (CN=...)",
"type": "string"
},
"subject_alt_names": {
"description": "Subject Alternative Names the cert is valid for",
"items": {
"type": "string"
},
"type": "array"
},
"valid": {
"description": "true if certificate is currently valid and not expired",
"type": "boolean"
},
"valid_from": {
"description": "Certificate valid-from date (ISO 8601)",
"format": "date-time",
"type": "string"
},
"valid_to": {
"description": "Certificate expiry date (ISO 8601)",
"format": "date-time",
"type": "string"
}
},
"required": [
"domain",
"port",
"valid",
"days_remaining"
],
"type": "object"
},
"success": {
"type": "boolean"
}
},
"required": [
"success",
"data"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}