Libraries tagged by Request Signing

API key management for Laravel — attach API keys to any Eloquent model, authenticate requests via HMAC SHA-256, cache keys in Redis, and support stancl/tenancy v4 multi-tenant architectures.

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Official PHP client for the esigner e-signing API: BankID, MitID and other eID signature requests, signed PDFs and verified webhooks.

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Official PHP SDK for the WeEasyCrypto tenant API — deposit addresses, balances, withdrawals, Ed25519 request signing and verified webhooks (no Composer dependencies; ext-sodium is bundled with PHP).

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Official WebKernelAI PHP SDK for application security, WAF filtering, HMAC request signing, security headers, and SEO telemetry.

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PHP SDK for the Web3e crypto payment gateway — request signing (v2) and webhook verification. Zero runtime dependencies.

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OsonSMS gateway SDK for any PHP framework with first-class Laravel support: send SMS, bulk messaging, delivery responses and optional SHA-256 request signing.

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Reusable Laravel API client security module: client credential/token management, Sanctum token caching, per-token TTL, IP whitelisting, ASR request signing, token-ability enforcement, and API activity logging.

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PHP client for the TikTok Shop API (TikTok Shop Partner API): request signing, OAuth, multi-shop support and typed webhooks. Unofficial. Not affiliated with or endorsed by TikTok or ByteDance.

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Alibaba Cloud API Gateway request signing plugin for Guzzle Bundle ⛽️

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Protect Laravel APIs with HMAC-SHA256 request signing headers (X-POWERED-BY, X-TIMESTAMP, X-SIGNATURE) - authenticity, tamper-proofing and replay-attack prevention.

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PHP SDK for the OVHcloud API — native request signing, typed clients and high-level modules for every product

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Certificate signing request (CSR) parser

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Laravel provider for signing AWS Elasticsearch Service requests

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PHP HMAC utility library for signing and verifying signed requests

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Omnisign Yousign: simple, advanced and qualified electronic signatures through Yousign's public API v3 (Youtrust since its new name) - a signature request built from documents, signers and fields, activated, followed, reminded, cancelled; signing in the application's page; the signed documents and the audit trail; webhooks with their signature checked.

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