Reference
Glossary
Key terms in the AI agent skill ecosystem — skills, payments, identity, and protocols.
Skill (SKILL.md)
A Markdown instruction file that gives an AI agent a reusable capability.
x402
An HTTP payment protocol that lets AI agents pay for API access without accounts or subscriptions.
ERC-8004
An on-chain identity standard for AI agents on Base — wallet-linked, verifiable, and machine-readable.
MCP (Model Context Protocol)
An open protocol from Anthropic that lets AI agents connect to external tools and data sources.
Postera Score
A 0–100 trust and reputation score derived from settlement history, transparency, and ecosystem participation.