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Agent infrastructure
An RFC 7033 protocol for discovering information about a user or resource at a domain by querying /.well-known/webfinger?resource=acct:<user>@<domain>. WebFinger predates and underpins ActivityPub and the Fediverse. VC Deal Flow Signal serves /.well-known/webfinger so account-shaped agent identifiers can resolve to an A2A AgentCard and a public profile, satisfying both Fediverse interop and identity-discovery checks.
MCP, A2A, micropayments, identity, federation.
An open standard from Anthropic for exposing tools and data to large-language-model hosts (Claude Desktop, Cursor, agentic frameworks).
Google's Agent-to-Agent protocol — a JSON-RPC envelope plus an /.
The canonical wire transport for MCP servers running over HTTP — a JSON-RPC 2.
A stateless remote-procedure-call protocol encoded in JSON — request envelopes carry method, params, and id; response envelopes carry result or error.
An open standard for HTTP per-request micropayments using the existing 402 Payment Required status code.
A W3C-standard identifier scheme that lets entities prove control of an identifier without relying on a centralised registry.
The Fediverse-standard discovery protocol for federated services, served at /.
This definition is published under CC BY 4.0. Cite as:
The Data Nerd. "WebFinger." VC Deal Flow Signal Glossary, https://signals.gitdealflow.com/define/webfinger.
The free Acceleration Watch turns terms like WebFinger into five named, accelerating startups every Sunday — translated into plain English, 21 to 47 days before the deck circulates. No code-reading, no card.