AgentIndex icon
AgentIndex
tardygrada logo
tardygrada
★ 23
vs
SchemaPin logo
SchemaPin
★ 16

tardygrada vs SchemaPin

tardygrada: Tardygrada is a programming language that compiles to MCP servers, where every value carries cryptographic proof of its creator, creation time, and integrity. It guarantees integrity via mprotect, SHA-256, ed25519, and BFT consensus (proven in Coq), provenance with signed metadata, and a full audit trail. However, it does not guarantee truth; it only ensures the value has not been changed, providing 100% proof even after 100 handoffs among agents.; SchemaPin: SchemaPin enables tool developers to sign schemas and skill folders with ECDSA P-256 keys, and AI agents to verify schema integrity. Public keys are discovered via .well-known/schemapin.json, and Trust-On-First-Use pinning prevents key substitution. It supports key revocation, trust bundles, and multiple languages (Python, JS, Go, Rust).

01

TL;DR

tardygrada logo
tardygradaSecurity & Safety · ★ 23

Securing multi-agent systems where integrity of data passed between agents is critical

Read tardygrada full review →
SchemaPin logo
SchemaPinSecurity & Safety · ★ 16

Signing and verifying tool schemas for AI agents to prevent tampering

Read SchemaPin full review →
02

Side-by-Side Comparison

Field
tardygrada logotardygrada
SchemaPin logoSchemaPin
Category
Security & Safety
Security & Safety
Stars
★ 23
★ 16
License
MIT
MIT
Install Command
git clone https://github.com/fabio-rovai/tardygrada && cd tardygrada && make
pip install schemapin
Updated
2mo ago
1w ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
agent-framework, ai-agents, ai-safety
agent, agents, ai
03

Features

tardygrada logotardygrada
01Integrity guarantees via OS kernel (mprotect) and cryptography (SHA-256, ed25519)
02Provenance tracking with signed metadata (who, when)
03Full audit trail for every operation
04Multiple immutability tiers (let, @verified, @hardened, @sovereign)
05Compiles to MCP servers for integration with agent frameworks
SchemaPin logoSchemaPin
01ECDSA P-256 + SHA-256 cryptographic signatures
02.well-known public key discovery (RFC 8615)
03Trust-On-First-Use (TOFU) key pinning
04Key revocation with signed documents and structured reasons
05Multi-language support (Python, JavaScript, Go, Rust)
04

Use Cases

tardygrada logotardygrada
↳Securing multi-agent systems where integrity of data passed between agents is critical
↳High-confidence domains like medical diagnosis requiring tamper-proof evidence
↳Retrofitting existing agent frameworks (CrewAI, LlamaIndex, MiroFish) with integrity proofs
SchemaPin logoSchemaPin
↳Signing and verifying tool schemas for AI agents to prevent tampering
↳Protecting MCP servers from rug-pull attacks by pinning keys via TOFU
↳Offline or air-gapped verification using trust bundles
FAQ

FAQ

What is the difference between tardygrada and SchemaPin?
Both tardygrada and SchemaPin are in the Security & Safety category. tardygrada has 23 stars, while SchemaPin has 16 stars.
Which is better, tardygrada or SchemaPin?
The best choice depends on your use case. Choose tardygrada if Securing multi-agent systems where integrity of data passed between agents is critical, and SchemaPin if Signing and verifying tool schemas for AI agents to prevent tampering.
Is tardygrada free or open source?
Yes, tardygrada is open source on GitHub (MIT).
Is SchemaPin free or open source?
Yes, SchemaPin is open source on GitHub (MIT).
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Alternatives to tardygrada →Alternatives to SchemaPin →tardygrada details →SchemaPin details →