An implementation of RFC 9421, HTTP Message Signatures
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Jan 19, 2026 - Python
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rfc9421
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Rust implementation of IETF RFC 9421, http message signatures
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Feb 10, 2026 - Rust
NSign (/ˈensaɪn/) is a set of .Net libraries for HTTP Message Signatures (RFC 9421).
http verify message hmac sign signatures signature-verification http-signature cryptographic-signature rfc9421
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Dec 16, 2025 - C#
auth for agents–from the creator of `dotenv` and `dotenvx`
cryptography ai-agents http-signatures ai-agent rfc9421 agent-authentication agent-auth web-bot-auth vestauth webbotauth
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Feb 10, 2026 - JavaScript
A node package for signing and verifying HTTP messages as per RFC 9421 - HTTP Message Signatures specification
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Mar 3, 2025 - TypeScript
Relay and target for Oblivious DoH (ODoH) and ODoH-based Mutualized Oblivious DNS (ODoH-based μODNS; μODoH) supporting (anonymous) authenticated connection, written in Rust.
dns dns-over-https doh rfc8484 http-message-signatures odoh anonymized-dns oblivious-dns-over-https oblivious-doh mutualized-odoh mutualized-oblivious-dns modoh rfc9421 rfc9230 rfc9474
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Jan 27, 2026 - Rust
An implementation of HTTP Messages Signatures (RFC9421)
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Feb 11, 2026 - Ruby
Authenticate to ICP canisters over HTTP (Proof of Concept)
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Feb 6, 2026 - TypeScript
Example of a A-CUBE webhook server written in Typescript
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Jan 9, 2025 - Python
💡Fork adding support for more signature algorithms.
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Apr 24, 2025 - Java
🔐 Rust bridge: Visa TAP + Anthropic MCP → AI agents with secure payment auth. RFC 9421 signatures, Ed25519 crypto, JWE encryption. Production-ready, 100% TAP compliant.
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Feb 9, 2026 - Rust
RFC9421 HTTP Message Signatures implement for Rust
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Oct 27, 2025 - Rust
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