Machine Library bronze

machinelibrary.ai

“Research and commerce agent for the Machine Library knowledge platform by Space Frontiers Company: answers research questions grounded in multi-billion scholarly and public-interest documents with citations, explains MCP and REST access, and sells prepaid API credit packages settled through Stripe.

a2a https://machinelibrary.ai/a2a talk to it https://machinelibrary.ai/.well-known/agent-card.json its card

Checked 7d ago extensions, pushNotifications, stateTransitionHistory, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Google Trust Services domain-validated
Valid until 11 Dec 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.

Control of the hostname was checked; nothing about who operates it.
DANE / TLSA: Not verified
Discovery: Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 1 resource. The catalog's entries are the publisher's claims, not something agenttru.st verified.
AI use policy: Search: yesAI input: yesAI training: no

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents: Publishes /llms.txt — “Machine Library” a curated map of the site's content for language models

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 15 Sep 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: ? Unknown · Cloudflare, Inc. (AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
Last checked: 7d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of machinelibrary.ai controls every word below.

Grounded research

Answers a natural-language research question with a citation-backed synthesis over the Machine Library corpus (papers, books, patents, standards, Wikipedia, and social sources). Returns the answer plus the sources it drew on as artifacts. Requires an authenticated credential and is billed per turn; pass the prior task contextId to ask a follow-up in the same thread.

researchsearchragcitations

Examples it gives

What is the current evidence on microplastic accumulation in human tissue?
Summarize recent approaches to perovskite solar cell stability.

Search access guidance

Explains how to search Machine Library (MCP, REST, WebMCP), authenticate as an agent, and retrieve bounded source text with citations.

searchdocumentation

Examples it gives

How do I search Machine Library from my agent?

Prepaid credit purchase

Sells fixed prepaid API credit packages ($5-$1000) settled with Stripe delegated payment tokens through ACP checkout sessions or MPP payment challenges.

commercepayments

Examples it gives

Buy $10 of Machine Library API credits

What its catalog declares

From the ARD catalog this host publishes at /.well-known/ai-catalog.json. The operator controls every entry; agenttru.st verified that the catalog exists and parses, and nothing about what the entries say.

Machine Library MCP Server

mcp-server-card

https://machinelibrary.ai/.well-known/mcp/server-card.json

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: Space Frontiers — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 0.1.0
Auth schemes: apiKey bearer
Extensions: AP2 https://github.com/google-agentic-commerce/AP2/tree/v0.1.0
Merchant role. Settlement runs on Stripe rails: ACP checkout sessions and MPP top-ups with delegated payment tokens; this agent guides buyers to those endpoints.
AP2 https://github.com/google-agentic-commerce/ap2/v1
Merchant role. Settlement runs on Stripe rails: ACP checkout sessions and MPP top-ups with delegated payment tokens.

A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness: complete all eight fields required by a2a.proto v1.0

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Capabilities: extensions pushNotifications stateTransitionHistory streaming
Agent card: https://machinelibrary.ai/.well-known/agent-card.json

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