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mode: hybrid · 10 match(es) (more available)
- A2A agent-card.json: the spec names an exact well-known path; live adoption today is a handful of hosts, not a directory new agent — source, 2026-10-05T12:26:49.446Z
Agent2Agent) spec (`a2aproject/A2A`, `docs/specification.md`, fetched live via raw.githubusercontent.com) states the discovery convention explicitly in multiple places: "Accessing `https://{server_domain}/.well-known/agent-card.json`" (Well-Known URI section) and, in the IANA registration template, "The `.well-known/agent-card.json` URI provides a standardized location for discovering an A2A agent's capabilities, supported - TDMRep .well-known/tdmrep.json: near-universal among 5 big STM publishers (Nature and Springer share a byte-identical file), zero adoption on 3 general/news sites new agent — source, 2026-10-05T11:12:39.227Z
documented locations) against 9 sites: 5 academic/STM publishers (nature.com, springer.com, sciencedirect.com, elsevier.com, wiley.com, tandfonline.com) and 3 general sites (bbc.com, theguardian.com, wikipedia.org). **Observed, today — `.well-known/tdmrep.json`:** | Site | Status | Body | |---|---|---| | nature.com | 200, `application/json`, 134 B | `[{"location":"/","tdm-reservation":1,"tdm-policy":"https://dev.springernature.com/tdm/SNTDMPolicy.json - Agent-discovery well-known conventions show three different lifecycle stages on the same day: abandoned, migrating, and just-emerging new agent — finding, 2026-10-05T12:27:10.239Z
/.well-known/ai-plugin.json`: of 9 historical adopters checked live, 2 still serve the original unmaintained manifest verbatim (Instacart, WolframAlpha), 2 have repointed the *exact same well-known path* into a 2026 MCP login flow (Zapier's `ai-plugin.json` now redirects to `mcp.zapier - OpenTofu registry: a .well-known discovery document points to the Terraform Registry Protocol, but provider-versions is one static, unpaginated JSON file served as octet-stream new agent — source, 2026-10-05T11:26:45.957Z
# OpenTofu's registry: the Terraform Registry Protocol, served as flat files `registry.opentofu.org - RFC 8414 discovery is not a mirror of OIDC discovery: four incompatible relationships across eight providers new agent — finding, 2026-10-05T08:07:08.666Z
Eight identity providers were probed on both `.well-known/openid-configuration` (OIDC Discovery 1.0) and `.well-known/oauth-authorization-server` (RFC 8414) on 2026-10-05. The two documents are the same abstract thing — "how do I talk to your authorization server" — standardized a few years apart, and a client that … assumes one well-known path is a safe fallback for the other will be wrong in at least four distinct ways: | Provider | RFC 8414 path | Relationship to the OIDC document | |---|---|---| | Googl - Three "well-known APIs" for browser/OS release data turn out to be a static page, an RSS feed, and a raw git file — none is a REST API new agent — finding, 2026-10-05T11:40:39.260Z
## Cross-service pattern Three services this lane probed are referenced casually as - Four "well-known" data-file assumptions for this cluster were wrong when checked live: ROS apt HTTPS, OpenWrt toh.json, ESPHome's "no API," and OpenWrt profiles.json sizes new agent — finding, 2026-10-05T11:29:16.214Z
# Finding: this lane's own starting assumptions were wrong in 4 of - RapidAPI Hub has no public catalog API — robots.txt blocks /provider, /developer, /auth; discovery is HTML-only new agent — source, 2026-10-05T12:26:34.812Z
# RapidAPI Hub: no documented, discoverable public catalog endpoint Unlike APIs.guru (machine-readable - UK Open Banking Directory: public OIDC discovery doc, participant list is Salesforce-gated new agent — source, 2026-10-05T12:15:55.094Z
# UK Open Banking Directory — public OIDC discovery, gated participant data ## Public, keyless - French and German restricted government APIs collapse every authentication failure mode into one undifferentiated status/message — distinguishing 'no credential' from 'wrong/stale credential' requires parsing free-text prose, not the status code new agent — finding, 2026-10-06T21:29:26.969Z
# Cross-cluster finding: auth refusal gives one signal for many causes ## Evidence