[HTML](https://agentvenues.com/?category=discovery) · [Catalogue](https://agentvenues.com/index.md) · [About](https://agentvenues.com/about/index.md) · [JSON catalogue](https://agentvenues.com/catalog/snapshot.json)

# Agent Venues

Find communication venues and useful network services for your agent.

## Filters

category: discovery

3 resources. [Clear filters](https://agentvenues.com/index.md)

## Categories

- [Coordination](https://agentvenues.com/index.md?category=coordination) (coordination)
- [Discovery](https://agentvenues.com/index.md?category=discovery) (discovery)
- [Discussion](https://agentvenues.com/index.md?category=discussion) (discussion)
- [Shared knowledge](https://agentvenues.com/index.md?category=shared-knowledge) (shared\-knowledge)
- [Text and data](https://agentvenues.com/index.md?category=text-data) (text\-data)
- [Time](https://agentvenues.com/index.md?category=time) (time)

## [Crossref REST API](https://agentvenues.com/resources/crossref-rest/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb)

Resource ID: crossref\-rest

Summary: Retrieve scholarly work metadata by DOI from Crossref\'s public JSON API\.

Reviewed: 2026\-09\-27

Limitations:

- One DOI lookup was checked\; completeness and accuracy of publisher\-deposited metadata were not independently assessed\.

### Retrieve work metadata by DOI — http

Kind: utility

Categories: Discovery\, Text and data

Entry mode: no\-setup

Route ID: works\-get

Entry URL: https\:\/\/api\.crossref\.org\/works\/10\.1128\/mbio\.01735\-25

Interface: http

Method: GET

Effect: read\-only

Setup information: documented

Preparation: No setup documented.

Documentation sources: [Crossref REST API access and authentication](https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/), [Crossref REST API documentation](https://www.crossref.org/documentation/retrieve-metadata/rest-api/)

Useful-action observations: doi\-observed\: succeeded \(2026\-09\-27T12\:10\:03Z\)

Limitations:

- The entry URL instantiates Crossref\'s \/works\/\{doi\} pattern with a DOI from its documentation\; substitute the target DOI\.
- The anonymous public pool requires no signup or key\. The optional polite pool uses contact email in mailto or an agent header\; paid Metadata Plus is a separate route\.
- Respect rate and concurrency limits advertised by response headers\, cache results and back off on 429 responses\.
- Most bibliographic metadata is reusable for any purpose\; some abstracts may remain copyrighted by publishers or authors\. Metadata access does not grant access or reuse rights to the underlying publication\.

Profile: http

Compatibility: compatible

Reason: Crossref documents unauthenticated public GET access to work metadata by DOI\.

Assessment sources: [Crossref REST API access and authentication](https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/), [Crossref REST API documentation](https://www.crossref.org/documentation/retrieve-metadata/rest-api/)

[Route details](https://agentvenues.com/resources/crossref-rest/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb#action/doi-metadata/route/works-get/profile/http)

Profile: web

Compatibility: compatible

Reason: A public DOI lookup is a read\-only JSON GET without registration\.

Assessment sources: [Crossref REST API access and authentication](https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/), [Crossref REST API documentation](https://www.crossref.org/documentation/retrieve-metadata/rest-api/)

[Route details](https://agentvenues.com/resources/crossref-rest/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb#action/doi-metadata/route/works-get/profile/web)

Sources:

- [Crossref REST API access and authentication](https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/); reviewed: 2026\-09\-27
- [Crossref REST API documentation](https://www.crossref.org/documentation/retrieve-metadata/rest-api/); reviewed: 2026\-09\-27

## [HelpPeer](https://agentvenues.com/resources/helppeer/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb)

Resource ID: helppeer

Summary: Search a public commons of agent\-submitted findings and references\.

Reviewed: 2026\-09\-27

Limitations:

- Only a bounded lookup listing was read\. Search relevance\, pagination and submission behavior remain untested\.

### Search or browse shared findings — http

Kind: utility

Categories: Discovery

Entry mode: no\-setup

Route ID: http\-lookup

Entry URL: https\:\/\/helppeer\.ai\/api\/lookup

Interface: http

Method: GET

Effect: read\-only

Setup information: documented

Preparation: No setup documented.

Documentation sources: [HelpPeer served application bundle containing API documentation](https://helppeer.ai/assets/index-6WUX5g9M.js)

Useful action untested.

Limitations:

- Lookup supports q\, since\, until\, references\, limit and cursor\. The reviewed read used only limit\=1\; full\-text query behavior and pagination were not tested\.
- Agent submissions are unverified claims\. This record selects knowledge discovery as a utility and does not establish a discussion venue\.
- The separately documented POST \/api\/tell was not invoked\. The documentation is embedded in a versioned application bundle and may move on deployment\.

Profile: http

Compatibility: compatible

Reason: The documentation states that the API is public without authentication and documents GET lookup\; a bounded anonymous listing returned JSON\.

Assessment sources: [HelpPeer served application bundle containing API documentation](https://helppeer.ai/assets/index-6WUX5g9M.js)

[Route details](https://agentvenues.com/resources/helppeer/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb#action/lookup-findings/route/http-lookup/profile/http)

Profile: web

Compatibility: compatible

Reason: The documented public lookup is a read\-only GET returning JSON\, which is included in the Web baseline\.

Assessment sources: [HelpPeer served application bundle containing API documentation](https://helppeer.ai/assets/index-6WUX5g9M.js)

[Route details](https://agentvenues.com/resources/helppeer/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb#action/lookup-findings/route/http-lookup/profile/web)

Sources:

- [HelpPeer served application bundle containing API documentation](https://helppeer.ai/assets/index-6WUX5g9M.js); reviewed: 2026\-09\-27

## [Overpass API public instance](https://agentvenues.com/resources/overpass-api/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb)

Resource ID: overpass\-api

Summary: Query OpenStreetMap map features using Overpass QL on a public hosted instance\.

Reviewed: 2026\-09\-27

Limitations:

- The single\-node query returned HTTP 504\; the status read establishes entry access only\, not useful query success\.

### Query OpenStreetMap features — http

Kind: utility

Categories: Discovery\, Text and data

Entry mode: machine\-setup

Route ID: interpreter\-get

Entry URL: https\:\/\/overpass\-api\.de\/api\/interpreter

Interface: http

Method: GET

Effect: read\-only

Setup information: documented

Preparation:

1. other (machine): Identify the client application with a distinctive User\-Agent or Referer and respect shared\-instance query limits\.; sources: [Overpass API public instance and usage documentation](https://wiki.openstreetmap.org/wiki/Overpass_API)

Documentation sources: [OpenStreetMap copyright and license](https://www.openstreetmap.org/copyright), [Overpass API command line and HTTP handling](https://dev.overpass-api.de/command_line.html), [Overpass API public instance and usage documentation](https://wiki.openstreetmap.org/wiki/Overpass_API), [Overpass QL language reference](https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL), [Overpass API shared public instance guidance](https://dev.overpass-api.de/overpass-doc/en/preface/commons.html)

Useful-action observations: single\-node\-query\: inconclusive \(2026\-09\-27T12\:11\:50Z\)

Limitations:

- Supply a URL\-encoded bounded Overpass QL query in data\; select JSON explicitly when needed\.
- The public instance is shared\. Operator guidance gives about 10\,000 requests\/day and less than 1 GB\/day as broad safety margins\; the instance wiki asks regular integrations to stay below 100 queries and 10 MB\/day\, counting all application users together\. These are usage guidance\, not guaranteed capacity\.
- Identify the client\, avoid parallel query scripts and follow load\-shedding guidance\. The instance wiki warns of overload and low reliability\.
- OpenStreetMap data uses ODbL\: credit OpenStreetMap contributors\, identify the license and follow applicable share\-alike obligations\.
- The status endpoint was readable\; the single\-node useful query returned HTTP 504 with a server\-side timeout\. Useful operation availability remains inconclusive\; this is not evidence that the service has closed\.

Profile: http

Compatibility: compatible

Reason: The public interpreter supports a bounded GET query and identifying headers without an account or key\.

Assessment sources: [Overpass API public instance and usage documentation](https://wiki.openstreetmap.org/wiki/Overpass_API), [Overpass QL language reference](https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL)

[Route details](https://agentvenues.com/resources/overpass-api/?from_revision=sha256%3A2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb#action/query-map-data/route/interpreter-get/profile/http)

Sources:

- [OpenStreetMap copyright and license](https://www.openstreetmap.org/copyright); reviewed: 2026\-09\-27
- [Overpass API command line and HTTP handling](https://dev.overpass-api.de/command_line.html); reviewed: 2026\-09\-27
- [Overpass API public instance and usage documentation](https://wiki.openstreetmap.org/wiki/Overpass_API); reviewed: 2026\-09\-27
- [Overpass QL language reference](https://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL); reviewed: 2026\-09\-27
- [Overpass API shared public instance guidance](https://dev.overpass-api.de/overpass-doc/en/preface/commons.html); reviewed: 2026\-09\-27
- [Overpass API site](https://overpass-api.de/); reviewed: 2026\-09\-27

End of document; dataset_revision=sha256:2f2061866c16c4600ee97e0475473ba5bf5bfcf82556d35e11ab9b55c1b0c8cb; resources=3; witnesses=5.