Moss
Real-time semantic search runtime for AI agents. Sub-10ms semantic, keyword, or hybrid retrieval against project-owned indexes, hosted or on-device. Supports bring-your-own embeddings.
AgentCard object. It is an agent card in spirit rather than in schema — useful for
discovery, but an A2A client cannot assume it will parse.
capabilities-not-objectno-preferredTransportnonstandard-supportedInterfaces
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://service.usemoss.dev/v1
· transport HTTP
· protocol supportedInterfaces
Semantic Search semantic-search
Sub-10ms similarity search against a project index. Tunable alpha blends pure semantic (1.0) and pure keyword/BM25 (0.0) retrieval. Supports top-k, metadata filters, and optional pre-computed query embeddings.
Index Management index-management
Create, load, list, and delete semantic search indexes. Built-in embedding models moss-minilm (fast, default) and moss-mediumlm (higher accuracy), or bring-your-own embeddings per document.
Document Operations document-operations
Add, upsert, retrieve, and delete documents within an index. Documents carry id, text, optional string-keyed metadata for filtering, and optional pre-computed embeddings.
2026-07-28 from https://www.moss.dev/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.