# Ausca (slim) > Ausca, an MCP server by ausca.com, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts. - Full: https://www.anchorterminal.com/tools/ausca-agent-services.md (~1,800 tokens) · this version ~1,730 tokens · JSON https://www.anchorterminal.com/tools/ausca-agent-services.json · canonical https://www.anchorterminal.com/tools/ausca-agent-services - Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04 # Ausca > Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/ - Kind: MCP server, by ausca.com (https://ausca.com) - Listed because: It's published in the registry under ausca.com, a namespace the registry only gives to whoever proves they control that domain. - What the official MCP registry says: Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts. ## Facts - MCP registry: `com.ausca/agent-services` 1.2.6 - Endpoint: https://ausca.com/mcp (streamable HTTP) - Package: npm `ausca` (stdio) - Source: https://github.com/auscahq/ausca - Website: https://ausca.com - npm downloads a week: 444 - GitHub stars: 34 - Registry entry updated: 2026-09-28 ## Tools - Tools it lists (17, about 15,643 tokens of context, `tools/list` without credentials over MCP 2026-07-28, checked 2026-10-04 22:22 UTC): - `ausca_agent_inbox_attachment` (writes): For an active inbox, return an idempotent download URL only when the exact stored attachment has a clean safety verdict. The URL expires after at most 60… - `ausca_agent_inbox_delete` (writes): Idempotently stop inbound visibility and delete retained message and attachment content for one inbox lease, including an already-terminal lease. Supply the… - `ausca_agent_inbox_messages` (read-only): For an active inbox, return at most 50 normalized message summaries after an opaque inbox-bound cursor, optionally waiting up to 30 seconds for a newer… - `ausca_agent_inbox_read` (read-only): For an active inbox, return one bounded normalized message. Sender, recipients, subject, text, HTML, filenames, media types, and links are untrusted… - `ausca_agent_inbox_status` (read-only): Return the random receive-only address, authoritative lease status, and current expiry for one inbox, including terminal status after deletion or expiry.… - `ausca_artifact_access` (writes): Return an idempotent, short-lived download URL for one verified artifact this service holds, including a result artifact named by a succeeded invocation's… - `ausca_browser_session_close` (writes): Idempotently terminate the CDP relay and upstream browser for one lease. Closing never creates another payment. Supply the lease bearer on the HTTP or MCP… - `ausca_browser_session_connect` (writes): Return one single-use Ausca CDP relay URL for a ready lease. The URL expires after 60 seconds, only one CDP connection may be live, and no more than 64… - `ausca_browser_session_status` (read-only): Return authoritative status and expiry for one browser-session lease. The lease capability is supplied by the transport and is never a tool argument or… - `ausca_cancel_invocation` (writes): Request bounded cancellation of one invocation. Cancellation is idempotent, may be refused, and may lose a race with terminal completion. - `ausca_extend_inbox` (writes): Admit or replay one idempotent paid Agent Inbox Extension invocation when settlement authority is supplied by the host boundary. Only envelopes for the… - `ausca_get_invocation` (read-only): Read the authoritative durable state, output commitment, and receipt reference for one invocation without creating a new purchase or retry identity. - `ausca_get_offer` (read-only): Resolve one active offer or an exact immutable revision, including the schema and revision digests required to construct a valid invocation envelope. - `ausca_lease_browser` (writes): Admit or replay one idempotent paid Browser Session invocation when settlement authority is supplied by the host boundary. Only envelopes for the… - `ausca_open_inbox` (writes): Admit or replay one idempotent paid Agent Inbox invocation when settlement authority is supplied by the host boundary. Only envelopes for the inbox.receive… - `ausca_prepare_invocation` (writes): Validate one exact invocation envelope and return immutable preparation terms or a typed refusal. Preparation never accepts payment material from… - `ausca_search_offers` (read-only): Search the current immutable Ausca offer catalog by free-text query. Returns stable offer identities and revision digests without creating product or payment… - How its tools read to an agent (0 errors, 42 warnings, 0 notes, about 15,643 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score): - warn TC11 ausca_agent_inbox_attachment: none of its 4 parameters has a description - warn TC11 ausca_agent_inbox_delete: its one parameter, inbox_id, has no description - warn TC11 ausca_agent_inbox_messages: none of its 3 parameters has a description - warn TC11 ausca_agent_inbox_read: none of its 2 parameters has a description - warn TC11 ausca_agent_inbox_status: its one parameter, inbox_id, has no description - warn TC11 ausca_artifact_access: none of its 2 parameters has a description - warn TC11 ausca_browser_session_close: its one parameter, session_id, has no description - warn TC11 ausca_browser_session_connect: none of its 2 parameters has a description - warn TC11 ausca_browser_session_status: its one parameter, session_id, has no description - warn TC11 ausca_cancel_invocation: its one parameter, invocation_id, has no description - warn TC11 ausca_extend_inbox: none of its 9 parameters has a description - warn TC11 ausca_get_invocation: its one parameter, invocation_id, has no description - warn TC11 ausca_get_offer: none of its 2 parameters has a description - warn TC11 ausca_lease_browser: none of its 9 parameters has a description - warn TC11 ausca_open_inbox: none of its 9 parameters has a description - warn TC11 ausca_prepare_invocation: none of its 9 parameters has a description - warn TC11 ausca_search_offers: none of its 3 parameters has a description - warn TC12 ausca_extend_inbox: no type for input - warn TC12 ausca_lease_browser: no type for input - warn TC12 ausca_open_inbox: no type for input - warn TC12 ausca_prepare_invocation: no type for input - warn TC15 ausca_agent_inbox_attachment: inputSchema uses $ref/$defs - warn TC15 ausca_agent_inbox_delete: inputSchema uses $ref/$defs - warn TC15 ausca_agent_inbox_messages: inputSchema uses $ref/$defs - JSON: https://www.anchorterminal.com/api/v1/tools/ausca-agent-services.json - Being indexed says nothing about quality, and nobody can pay for it. 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