Enterprise digital signing platform. One unified API to sign any document using any certificate authority, securely powered by software certificates or robust HSM integrations.
Securing and verifying documents at scale requires navigating complex legal frameworks, cryptographic standards, and hardware integrations. Ad-hoc solutions often fail to meet stringent compliance requirements.
PDFs, XML invoices, contracts, and official government filings require legally recognized signatures to ensure compliance and validity.
Handling Class 3, Organization, and Document Signer certificates across different Certificate Authorities (CAs) adds integration friction.
Cryptographic private keys must remain inside secure Hardware Security Modules (HSMs) to prevent unauthorized extraction.
Signatures must stay valid and verifiable years after signing, even after certificates expire or CAs change.
One API. Any Document. Any CA. Any HSM.
Full support for PAdES-LT and PAdES-LTA levels. Customize signature appearance with visible branding or sign silently with invisible signatures.
Generate secure, standards-compliant XAdES-T signatures. Supports enveloped and enveloping formats to secure complex web services and invoices.
Sign binary data and any file type with CAdES-T detached P7S signatures, providing flexible data integrity and authorship verification.
Seamlessly integrates with PKCS#11 compliant Hardware Security Modules (HSMs) from all major vendors, securing high-value signing keys.
Includes production-grade Time Stamping Authority (TSA) support. Embed cryptographically-verifiable proof of signing time for long-term validation.
A unified REST API connecting your applications to secure signing hardware and trust services.
ERP / Web App / Mobile / PHP / Python
Empowering diverse sectors with secure, high-throughput digital signing capabilities.
Perfect for loan agreements, customer KYC documents, NACH mandate files, and high-value trade finance transactions.
Digitally sign patient prescriptions, diagnostic laboratory reports, and official medical consent forms to ensure confidentiality and validity.
Legally bind contracts, service agreements, court affidavits, legal submissions, and corporate Memorandums of Understanding (MOUs).
Streamline e-tendering procedures, issue certified citizen documents, respond to RTI inquiries, and validate licenses and permits.
Automate generation of GST e-invoices, purchase orders (POs), delivery confirmations, and supplier contracts at scale.
Issue secure candidate offer letters, employee salary slips, provident fund (PF) declarations, and annual performance appraisal reviews.
Experience a sample HTTP REST request and response payload for signing and validating documents.
file=@invoice.pdf
outputFormat=pdf_sign
visibleSignature=true
embedTimestamp=true
ltv=true
page=last
position=bottom-right
reason=Authorised Signatory
location=India
{
"success": true,
"sessionId": "uuid",
"signature": {
"padesLevel": "PAdES-LT",
"signedAt": "2026-06-16T12:00Z",
"certificate": {
"cn": "DS FUTURIQ..."
},
"certValidation": {
"crl": { "passed": true }
}
},
"timestamp": {
"status": "granted",
"env": "production"
}
}
Fully compliant with domestic legislation and global cryptographic formats.
Indian Information Technology Act — Legally admissible digital signatures recognized by all regulatory frameworks.
PDF Advanced Electronic Signatures — Supports stable B-LT and LTA long-term validation verification levels.
XML Advanced Electronic Signatures — Supports robust XAdES-T integration structures for automated reporting.
CMS Advanced Electronic Signatures — Supports CAdES-T for arbitrary binary metadata payloads.
Internet X.509 PKI Timestamp Protocol — Secure connection to trusted Time Stamping Authorities.
Cryptographic Token Interface Standard — Direct native driver connection to hardware security modules.
SignerX API works with ANY PKCS#11 compliant HSM — simply configure the library path and key labels in .env
| HSM Vendor | PKCS#11 Library | Config Env Var | Status |
|---|---|---|---|
| Utimaco | libcs_pkcs11_R3.so |
CS_PKCS11_R3_CFG |
Tested |
| SafeNet/Thales Luna | libCryptoki2_64.so |
ChrystokiConfigurationPath |
Supported |
| Entrust nShield | libcknfast.so |
CKNFAST_LOADSHARING |
Supported |
| AWS CloudHSM | libcloudhsm_pkcs11.so |
CLOUDHSM_PIN |
Supported |
| SoftHSM2 | libsofthsm2.so |
SOFTHSM2_CONF |
Testing |
| Thales DPoD | libpkcs11.so |
P11_LIB_PATH |
Supported |
Integrate digital signing in minutes with standard HTTP POST requests.
import requests requests.post( url, files={...}, data={...} )
curl_setopt(
$curl,
CURLOPT_POSTFIELDS,
$data
);
// JSON response with signed URL
HttpClient → multipart/form-data // Works with: Apache HttpClient OkHttp or HttpURLConnection
HttpClient.PostAsync(
url,
MultipartFormDataContent
)
axios.post(url, formData) or node-fetch(url, { method: 'POST' })
curl -X POST \ -F file=@document.pdf \ -F visibleSignature=true \ http://api.signerx.com/sign
Secure identity verification workflow for Authentication & KYC User Agencies.
Authentication User Agency
Verifies Aadhaar holder identity details dynamically.
KYC User Agency
Retrieves authenticated full KYC profile data records.
Secure Key Storage
Decrypts records via RSA OAEP decryption protocols.
Encrypted Response
AES-CFB decryption of received Aadhaar KYC XML.
XML Signing W3C DSig
Enveloped XML formats running SHA256withRSA.
Decrypt Aadhaar eKYC for account opening, loan applications, and credit card issuance.
Verify subscriber identity using Aadhaar authentication for new SIM card issuance.
KYC verification for policy issuance, claims processing, and beneficiary setup.
Citizen verification for welfare schemes, subsidy disbursement, and e-governance.
Employee identity verification during joining — PAN/Aadhaar linkage and BGV.
Instant KYC for NBFC, P2P lending, and digital credit underwriting.
A production-ready solution that solves complex signing, security, and integration challenges.
Legally admissible digital signatures in India, fully recognized and compliant with national regulatory frameworks.
Full conformance to major ETSI digital signature standards for PDFs, XMLs, and arbitrary binary datasets.
Automatically retrieves and reads OCSP, CRL, and AIA endpoints directly from certificates for rapid validation checks.
Out-of-the-box support for leading hardware token modules (Utimaco, SafeNet, nShield, AWS, and more).
Production-grade TSA connectivity to stamp document authenticity at the exact moment of signing.
Complete control of your secure enterprise environments. Zero cloud dependencies or data leaks.
Integrate the SignerX API in your applications today and deploy on-premise with zero dependencies.