Security
Parse an X.509 SSL/TLS certificate (paste PEM or upload .pem/.crt) and inspect subject, issuer, validity period with expiry status, public key, signature algorithm, serial, SANs, key usage and fingerprint. Like openssl x509 -text, visualised. Runs locally.
Call this tool from your code in three languages.
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/certificate-decoder' \
-H 'Content-Type: application/json' \
-d '{"filename":"file.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/certificate-decoder' \
-F 'certText=-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----' \
-F 'file=uploads/2026/01/01/your-tool-1700000000000-abc123.ext'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST https://api.elysiatools.com/en/api/tools/certificate-decoder| Name | Type | Required | Description |
|---|---|---|---|
| certText | textarea | No | — |
| file | fileupload required | No | — |
HTML result
{
"result": "<div>Processed HTML content</div>",
"error": "Error message (optional)",
"message": "Notification message (optional)",
"metadata": {
"key": "value"
}
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-certificate-decoder": {
"name": "certificate-decoder",
"description": "Parse an X.509 SSL/TLS certificate (paste PEM or upload .pem/.crt) and inspect subject, issuer, validity period with expiry status, public key, signature algorithm, serial, SANs, key usage and fingerprint. Like openssl x509 -text, visualised. Runs locally.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=certificate-decoder",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "certificate-decoder",
"arguments": {
"certText": "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----",
"file": "https://example.com/file.ext"
}
}
}Questions or issues? Contact [email protected]