Space Frontiers is a Wyoming corporation whose search and AI product, Machine Library (formerly Space Frontiers search, moved to machinelibrary.ai on 2026-09-12), is a full-text retrieval API and hosted MCP server over a corpus the provider describes as multi-billion documents: peer-reviewed papers (CrossRef, PubMed, arXiv), books, USPTO patents, Wikipedia, technical standards, YouTube transcripts, and live Reddit, Telegram and Discord posts. It is built for AI agents doing literature review, fact-checking, citation walking and grounded research synthesis, returning compact reranked hits with canonical source URIs (DOI, arXiv, PMID, ISBN) and token-bounded full text. Three surfaces share one account and API key: a REST API at api.machinelibrary.ai (OpenAPI 3.1, pay-as-you-go), a Streamable-HTTP MCP server at mcp.machinelibrary.ai (OAuth 2.1 with PKCE and RFC 7591 dynamic registration against the issuer api.machinelibrary.ai, scope search, or a Bearer API key), and an A2A agent at machinelibrary.ai/a2a. It also ships a PDF/EPUB/DJVU-to-Markdown recognition API and Stripe-settled prepaid credit packages for agents (ACP checkout, MPP top-up). The company also publishes Hermes, an open-source Rust search engine with a gRPC contract and Python/TypeScript clients.
Space Frontiers publishes 9 API contracts indexed on the APIs.io network, including Documents API, Payments API, Raw document downloads API, and 6 more. Tagged areas include Research, Scholarly Search, Full-Text Search, Retrieval, and RAG.
The Space Frontiers catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.
Space Frontiers’ developer surface includes changelog, documentation, API reference, getting-started guide, pricing, support, signup flow, and 44 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Education & Research regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Show this score on your site.
It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/machinelibrary-ai/"><img src="https://apis.io/badge/machinelibrary-ai/card.svg" alt="Space Frontiers on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
Typed Event Surface+6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility+6 pts — a reversal operation in the contract, graded up when a window is documented too
Agentic Commerce Well-Known Document+5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
The Kin Score Market layer reads a provider inside its market:
its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted:
not part of the Kin Score or agent readiness.
Registered MCP server and declares compatibility are report only — not weighted.
Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Hosted Streamable-HTTP MCP server at https://mcp.machinelibrary.ai (legacy https://mcp.spacefrontiers.org still served) exposing nine machinelibrary_* tools: four read-only, ide...
A2A (protocolVersion 0.3.0) research and commerce agent at https://machinelibrary.ai/a2a over JSON-RPC: grounded research answers with citation artifacts, search-access guidance...
Self-hosted, MIT-licensed Rust search engine published by Space Frontiers (github.com/SpaceFrontiers/hermes) with a published protobuf wire contract: hermes.SearchService (Searc...
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
aid: machinelibrary-ai
name: Space Frontiers
description: 'Space Frontiers is a Wyoming corporation whose search and AI product, Machine Library (formerly Space Frontiers
search, moved to machinelibrary.ai on 2026-09-12), is a full-text retrieval API and hosted MCP server over a corpus the
provider describes as multi-billion documents: peer-reviewed papers (CrossRef, PubMed, arXiv), books, USPTO patents, Wikipedia,
technical standards, YouTube transcripts, and live Reddit, Telegram and Discord posts. It is built for AI agents doing literature
review, fact-checking, citation walking and grounded research synthesis, returning compact reranked hits with canonical
source URIs (DOI, arXiv, PMID, ISBN) and token-bounded full text. Three surfaces share one account and API key: a REST API
at api.machinelibrary.ai (OpenAPI 3.1, pay-as-you-go), a Streamable-HTTP MCP server at mcp.machinelibrary.ai (OAuth 2.1
with PKCE and RFC 7591 dynamic registration against the issuer api.machinelibrary.ai, scope search, or a Bearer API key),
and an A2A agent at machinelibrary.ai/a2a. It also ships a PDF/EPUB/DJVU-to-Markdown recognition API and Stripe-settled
prepaid credit packages for agents (ACP checkout, MPP top-up). The company also publishes Hermes, an open-source Rust search
engine with a gRPC contract and Python/TypeScript clients.'
url: https://raw.githubusercontent.com/api-evangelist/machinelibrary-ai/refs/heads/main/apis.yml
deliveryModel:
model: saas
license_evidence:
not_product:
- spacefrontiers/hermes
- spacefrontiers/mcp
open_source: unknown
commercial: true
callable_host: true
label: Hosted service · you call their endpoint
confidence: low
source:
- openapi
- pricing
- repository-not-product
generated: '2026-09-25'
method: derived
image: https://machinelibrary.ai/press/icon-512.png
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pipeline local-v3 pass on 2026-09-19 found a live OpenAPI 3.1, hosted MCP server, A2A agent card,
llms.txt, RFC 8414/9728 metadata and an RFC 9727 api-catalog
website: https://machinelibrary.ai
x-legal-name: Space Frontiers
x-headquarters: Sheridan, Wyoming, United States
x-product-name: Machine Library
x-former-domain: spacefrontiers.org
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-10-06'
tags:
- Research
- Scholarly Search
- Full-Text Search
- Retrieval
- RAG
- Patents
- Documents
- OCR
- Document Recognition
- MCP
- A2A
- Agent-Native
- AI Agents
- Data
- Search
tags_raw:
- research
- scholarly-search
- full-text-search
- retrieval
- rag
- patents
- documents
- ocr
- document-recognition
- mcp
- a2a
- agent-native
- ai-agents
- data
- search
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
common:
- url: https://machinelibrary.ai/api/search/rss
type: BlogRSS
- type: AgenticAccess
url: agentic-access/machinelibrary-ai-agentic-access.yml
- type: Spectral
url: rules/machinelibrary-ai-rules.yml
- type: JSONLD
url: json-ld/machinelibrary-ai-context.jsonld
- type: Vocabulary
url: vocabulary/machinelibrary-ai-vocabulary.yml
- type: Security
url: security/machinelibrary-ai-vulnerability-disclosure.yml
- type: Hosts
url: hosts/machinelibrary-ai-hosts.yml
- type: Vendors
url: vendors/machinelibrary-ai-vendors.yml
- type: StatusPage
url: https://machinelibrary.ai/status
- type: Operations
url: https://machinelibrary.ai/docs/api/operations
- type: ChangeLog
url: https://machinelibrary.ai/changelog
- type: Datasets
url: https://machinelibrary.ai/datasets
- type: SecurityTxt
url: https://machinelibrary.ai/.well-known/security.txt
- type: APICatalog
url: https://machinelibrary.ai/.well-known/api-catalog
- type: OpenAPI
url: https://machinelibrary.ai/docs/openapi.json
- type: VulnerabilityDisclosure
url: security/machinelibrary-ai-vulnerability-disclosure.yml
- type: Overlay
url: overlays/machinelibrary-ai-openapi-overlay.yaml
- type: Website
url: https://machinelibrary.ai/
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: GettingStarted
url: https://machinelibrary.ai/docs/api
- type: Pricing
url: https://machinelibrary.ai/pricing
- type: Support
url: https://machinelibrary.ai/contacts
- type: Newsroom
url: https://machinelibrary.ai/press
- type: GitHubOrganization
url: https://github.com/SpaceFrontiers
- type: SignUp
url: https://machinelibrary.ai/auth/signup
- type: Login
url: https://machinelibrary.ai/auth/signin
- type: TermsOfService
url: https://machinelibrary.ai/terms-of-service
- type: PrivacyPolicy
url: https://machinelibrary.ai/privacy
- type: LLMsTxt
url: llms/machinelibrary-ai-llms.txt
- type: MCPServer
url: mcp/machinelibrary-ai-mcp.yml
- type: ToolCrosswalk
url: mcp/machinelibrary-ai-tool-crosswalk.yml
- type: AgentCard
url: a2a/machinelibrary-ai-a2a.yml
- type: WellKnown
url: well-known/machinelibrary-ai-well-known.yml
- type: Packages
url: packages/machinelibrary-ai-packages.yml
- type: SDKs
url: packages/machinelibrary-ai-packages.yml
- type: Conformance
url: conformance/machinelibrary-ai-conformance.yml
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: Lifecycle
url: lifecycle/machinelibrary-ai-lifecycle.yml
- type: DomainSecurity
url: security/machinelibrary-ai-domain-security.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: ChangeLog
url: changelog/machinelibrary-ai-changelog.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: AgentSkill
url: skills/_index.yml
- type: RegulatoryPosture
url: regulatory/machinelibrary-ai-regulatory-posture.yml
- type: Protobuf
url: grpc/machinelibrary-ai-hermes.proto
apis:
- name: Machine Library MCP Server
description: 'Hosted Streamable-HTTP MCP server at https://mcp.machinelibrary.ai (legacy https://mcp.spacefrontiers.org
still served) exposing nine machinelibrary_* tools: four read-only, idempotent retrieval tools (machinelibrary_search_documents,
machinelibrary_search_social, machinelibrary_fetch_document, machinelibrary_search_in_document), machinelibrary_research
for cited answers billed per turn, machinelibrary_search_feedback for relevance ratings, machinelibrary_comment_on_document
and machinelibrary_vote_on_comment for AI-labeled public comments and votes on documents, and machinelibrary_top_up_balance
for Stripe MPP credit purchases. The legacy spacefrontiers_* names remain accepted as aliases. OAuth 2.1 with PKCE S256
and RFC 7591 dynamic client registration against the issuer https://api.machinelibrary.ai (scope search), or a Bearer
API key; 60 requests per minute per source IP. Listed in the official MCP registry as io.github.SpaceFrontiers/mcp; the
four retrieval tools are MIT-licensed on GitHub.'
humanURL: https://machinelibrary.ai/mcp
baseURL: https://mcp.machinelibrary.ai
tags:
- MCP
- Agent-Native
- Retrieval
- Research
tags_raw:
- mcp
- agent-native
- retrieval
- research
properties:
- type: MCPServer
url: mcp/machinelibrary-ai-mcp.yml
- type: ToolCrosswalk
url: mcp/machinelibrary-ai-tool-crosswalk.yml
- type: Documentation
url: https://machinelibrary.ai/mcp
- type: GettingStarted
url: https://machinelibrary.ai/install.md
- type: SourceCode
url: https://github.com/SpaceFrontiers/mcp
- type: MCPRegistry
url: https://registry.modelcontextprotocol.io/v0/servers?search=spacefrontiers
- type: MCPServerCard
url: https://machinelibrary.ai/.well-known/mcp/server-card.json
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
aid: machinelibrary-ai:machine-library-mcp-server
- name: Machine Library A2A Agent
description: 'A2A (protocolVersion 0.3.0) research and commerce agent at https://machinelibrary.ai/a2a over JSON-RPC: grounded
research answers with citation artifacts, search-access guidance, and prepaid-credit sales settled through Stripe (ACP
checkout sessions and MPP payment challenges), with two AP2 merchant-role extensions declared. The agent card is served
at /.well-known/agent-card.json on machinelibrary.ai and spacefrontiers.org. Unauthenticated message/send is answered
live with authentication guidance.'
humanURL: https://machinelibrary.ai/.well-known/agent-card.json
baseURL: https://machinelibrary.ai/a2a
x-baseurl-note: JSON-RPC endpoint; answers POST message/send (200) and 404s a plain GET, so the humanURL is the served agent
card rather than the endpoint.
tags:
- A2A
- Agent-Native
- Research
- Payments
tags_raw:
- a2a
- agent-native
- research
- payments
properties:
- type: AgentCard
url: a2a/machinelibrary-ai-a2a.yml
- type: Documentation
url: https://api.machinelibrary.ai/auth.md
aid: machinelibrary-ai:machine-library-a2a-agent
- name: Hermes Search Engine gRPC API
description: 'Self-hosted, MIT-licensed Rust search engine published by Space Frontiers (github.com/SpaceFrontiers/hermes)
with a published protobuf wire contract: hermes.SearchService (Search, GetDocument, GetIndexInfo, GetTextStats) and hermes.IndexService
(index creation, streaming ingestion, primary-key deletion and upsert, commit, merge, vector-index retraining), plus hermes.broker.BrokerService
for shard topology. Distributed as crates (hermes-core, hermes-server, hermes-broker, hermes-tool), PyPI (hermes-client-python),
npm (hermes-client-typescript, hermes-wasm). There is no hosted endpoint: you run hermes-server yourself.'
humanURL: https://github.com/SpaceFrontiers/hermes
x-deployment: self-hosted
x-no-hosted-base-url: The gRPC server is run by the consumer (cargo install hermes-server); Space Frontiers publishes no
hosted Hermes endpoint, so no baseURL is recorded rather than inventing one.
tags:
- Search
- gRPC
- Open Source
tags_raw:
- search
- grpc
- open-source
- Open Source
- Open-Source
properties:
- type: Protobuf
url: grpc/machinelibrary-ai-hermes.proto
- type: Protobuf
url: grpc/machinelibrary-ai-hermes-broker.proto
- type: Documentation
url: https://github.com/SpaceFrontiers/hermes/blob/main/hermes-proto/README.md
- type: SourceCode
url: https://github.com/SpaceFrontiers/hermes
aid: machinelibrary-ai:hermes-search-engine-grpc-api
- aid: machinelibrary-ai:machinelibrary-ai-documents-api
name: Space Frontiers Documents API
description: Fetch documents by ID or canonical URI.
humanURL: https://machinelibrary.ai/docs/api
baseURL: https://api.machinelibrary.ai
tags:
- Documents
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-documents-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- type: JSONSchema
url: json-schema/machinelibrary-ai-by-uri-response-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-v2-document-response-schema.json
- aid: machinelibrary-ai:machinelibrary-ai-payments-api
name: Space Frontiers Payments API
description: The Payments API from Space Frontiers — 1 operation(s) for payments.
humanURL: https://machinelibrary.ai/docs/api
baseURL: https://api.machinelibrary.ai
tags:
- Payments
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-payments-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- aid: machinelibrary-ai:machinelibrary-ai-raw-document-downloads-api
name: Space Frontiers Raw document downloads API
description: Authenticated, feature-gated streaming of PDF, EPUB, and DJVU library originals.
humanURL: https://machinelibrary.ai/docs/api
baseURL: https://api.machinelibrary.ai
tags:
- Raw document downloads
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-raw-document-downloads-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- aid: machinelibrary-ai:machinelibrary-ai-recognition-api
name: Space Frontiers Recognition API
description: 'Document recognition: PDF, EPUB, and DJVU to structured Markdown with quality reports.'
humanURL: https://machinelibrary.ai/docs/api
baseURL: https://api.machinelibrary.ai
tags:
- Recognition
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-recognition-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- type: JSONSchema
url: json-schema/machinelibrary-ai-recognition-job-status-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-recognition-submission-schema.json
- aid: machinelibrary-ai:machinelibrary-ai-search-api
name: Space Frontiers Search API
description: Ranked retrieval and document similarity.
humanURL: https://machinelibrary.ai/docs/api
baseURL: https://api.machinelibrary.ai
tags:
- Search
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-search-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- type: JSONSchema
url: json-schema/machinelibrary-ai-search-request-v2-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-v2-search-response-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-similar-request-v2-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-search-feedback-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-feedback-accepted-schema.json
- aid: machinelibrary-ai:machinelibrary-ai-conversations-api
name: Space Frontiers Conversations API
description: Retrieval-augmented conversation workflows.
humanURL: https://machinelibrary.ai/mcp
baseURL: https://mcp.machinelibrary.ai
tags:
- Conversations
properties:
- type: OpenAPI
url: openapi/machinelibrary-ai-conversations-api-openapi.yml
- type: Documentation
url: https://machinelibrary.ai/docs/api
- type: APIReference
url: https://machinelibrary.ai/docs/api/reference
- type: Authentication
url: authentication/machinelibrary-ai-authentication.yml
- type: OAuthScopes
url: scopes/machinelibrary-ai-scopes.yml
- type: Conventions
url: conventions/machinelibrary-ai-conventions.yml
- type: Idempotency
url: conventions/machinelibrary-ai-conventions.yml
- type: ErrorCatalog
url: errors/machinelibrary-ai-problem-types.yml
- type: DataModel
url: data-model/machinelibrary-ai-data-model.yml
- type: RateLimits
url: rate-limits/machinelibrary-ai-rate-limits.yml
- type: Plans
url: plans/machinelibrary-ai-plans-pricing.yml
- type: Pricing
url: https://api.machinelibrary.ai/v1/pricing
- type: JSONSchema
url: json-schema/machinelibrary-ai-search-request-v2-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-conversation-response-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-conversation-request-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-v2-search-response-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-agent-comment-submission-schema.json
- type: JSONSchema
url: json-schema/machinelibrary-ai-recognition-job-status-schema.json
x-a2a:
verified: true
probed: '2026-09-26'
url: https://machinelibrary.ai/.well-known/agent-card.json
grade: conformant
protocol_version: 0.3.0
control: 404
x-correction-request:
requested: '2026-09-28'
source:
- https://github.com/api-evangelist/machinelibrary-ai/pull/1
request: 'Provider PR #1 (ppodolsky, 2026-09-26), verified live 2026-09-28; not merged because it predates the 09-27 per-area
OpenAPI split. Its rate-limits file is committed (12/60/30 requests per minute per source IP; https://machinelibrary.ai/docs/api/operations#limits).
Capture: OAuth authorization server issuer https://api.machinelibrary.ai, scopes_supported [search], PKCE S256, dynamic
client registration at /v2/oauth/register, protected-resource metadata on mcp.machinelibrary.ai naming that issuer (legacy
spacefrontiers hosts serve the same issuer); pages Operations https://machinelibrary.ai/docs/api/operations, ChangeLog
https://machinelibrary.ai/changelog, StatusPage https://machinelibrary.ai/status, Datasets https://machinelibrary.ai/datasets;
security.txt and api-catalog. MCP tools are renamed machinelibrary_* and number 9 in the live llms.txt (comment_on_document,
vote_on_comment added); live OpenAPI https://machinelibrary.ai/docs/openapi.json has 21 paths. Note: their api-catalog
links mcp.machinelibrary.ai/.well-known/mcp/server-card.json, which returns 404.'
earlier:
requested: '2026-09-27'
source: https://github.com/api-search/inbox/issues/39
request: 'Correction (with source-artifact PR https://github.com/api-evangelist/machinelibrary-ai/pull/1 -- review, do
NOT merge wholesale): provider page links https://apis.io/servers/machinelibrary-ai/space-frontiers-mcp-server/ which
404s -- use the current MCP product name so a working server page is generated; fix inconsistent counts and stale scope
data. Re-profile from current sources.'
applied: '2026-10-03'
applied_note: 'Hand-applied after the local re-profile ignored this block; every fact re-probed live 2026-10-03. Applied:
MCP manifest rebuilt with the nine machinelibrary_* tools and their descriptions from machinelibrary.ai/mcp and llms.txt
(live tools/list answers 401 without credentials, so the four open-source tools carry tools/list output from the provider''s
MIT server run in-process, the five hosted-only tools have no published input schema); legacy spacefrontiers_* aliases
recorded; rate limits 12/12/60/30 plus 30 agent comments per day; OAuth issuer moved to https://api.machinelibrary.ai
(scope search, PKCE S256, DCR /v2/oauth/register) in authentication, scopes and well-known; Operations, ChangeLog, StatusPage,
Datasets, SecurityTxt, APICatalog and live OpenAPI pointers; security.txt (now 200) and refreshed well-known captures,
llms.txt. Live OpenAPI has 21 paths; the committed six-area split already covers exactly those 21, so no re-pull. inbox#39:
MCP API entry already named Machine Library MCP Server and the description now uses current tool names and counts; the
corpus count is now the provider''s own ''multi-billion documents'' wording. The api-catalog no longer links the 404ing
mcp-host server card (it links the apex copy, which resolves). Not applied: the apis.io server-page 404 is a site rebuild,
not a repo fix.'
x-enrichment:
date: '2026-09-28'
status: enriched
artifacts_added: 21
pass: modular-v1
engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local
Space Frontiers API — frequently asked questions
Does Space Frontiers have an API?
Yes. APIs.io lists 9 APIs from Space Frontiers, including Machine Library MCP Server, Machine Library A2A Agent and Hermes Search Engine gRPC API, and 6 more.
Is there an OpenAPI specification for the Space Frontiers API?
Yes. APIs.io indexes 6 OpenAPI specifications for Space Frontiers, each linked for download from this page.
How do I authenticate with the Space Frontiers API?
Space Frontiers documents its authentication (apiKey/http/oauth2 · 3 schemes). The details are profiled on APIs.io as Machinelibrary Ai Authentication.
How much does the Space Frontiers API cost?
APIs.io lists 2 pricing plans for Space Frontiers, with each plan's price, limits and inclusions under Pricing Plans on this page.
Does Space Frontiers have an MCP server?
Yes. APIs.io lists 1 MCP server for Space Frontiers: Remote MCP server at mcp.machinelibrary.ai over streamable HTTP requiring OAuth; 9 tools listed.
Is the Space Frontiers API ready for AI agents?
Space Frontiers has a Kin Score of 63.5 out of 100 (strong) and an Agent Readiness score of 68.9 (agent-ready), scored by API Evangelist on 2026-10-31.
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