WeatherAPI.com

weatherapi.com · Developer / Data APIs modeIntegrated

73 / 100Overall LLM-FriendlinessHow well an agent can use this service without handing work back to you.

Machine-Readability45 / 100

Custody / RiskUnknown

ConfidenceProvisional

Overall = mean of Interrupt Score 100 and Machine-Readability 45 → 73 / 100. The badge is set by the Interrupt Score alone — how scoring works.

Confidence: Provisional (0.55) — Based on Tier 0/1 evidence only (passive checks, no live transaction attempt) — treat the number as a triage signal, not a verified outcome.

Custody posture hasn't been assessed yet.

What your agent can do here

A plain-English read on the probe evidence — each verdict links to the finding behind it.

Can your agent sign up on its own?Signup inspected — no blocker found.
Can your agent read it without a human?Partially — some machine interfaces present.
Can your agent self-serve credentials or a token?Self-serve key detected.
Can your agent call it without a CAPTCHA?Unknown — live checkout not yet attempted.

Agent-readiness: Yes, with caveats — an AI agent can use WeatherAPI.com without a human for signup, docs, and credentials, but end-to-end use hasn't been live-verified yet (Provisional confidence).

Machine-Readability Score

Four check groups, equal weight: machine interfaces (OpenAPI, MCP server, llms.txt), browsing efficiency, element discoverability, and discovery/agent access (retrieval-bot robots.txt access, sitemap, schema.org). Each check is tagged with how strong the real-world evidence is that it changes agent behavior — proven, plausible, or emerging — grades are honesty labels, they never weight the score. A separate signal about ease of integration — it never enters the Interrupt Score or badge above.

45 / 100

llms.txtemergingFound — www.weatherapi.com/llms.txt
llms-full.txtemergingFound — www.weatherapi.com/llms-full.txt
AGENTS.mdemergingNot provided
A2A agent cardemergingNot provided
MCP server (well-known or official registry)plausibleNot provided
OpenAPI/Swagger specplausibleFound — www.weatherapi.com/openapi.json
Rate-limit headersplausibleNot provided
Structured JSON error responsesplausibleNot checked — no error response was sampled during this probe
OAuth authorization-server metadata (RFC 8414)provenNot provided
API catalog (RFC 9727)emergingNot provided
Agent-payment discovery (x402 / UCP)emergingNot provided
Lean HTML transfer sizeplausible289 KB raw HTML (threshold 488 KB)
Manageable DOM sizeplausible296 DOM nodes (threshold 1500)
High content-to-markup densityplausible13.9% text/HTML (41071 chars in 289 KB, threshold 5%)
Content readable without JS executionprovenraw HTML holds 980% of rendered text (41071 vs 4193 chars; threshold 40%)
Clean-content alternate (RSS/Atom/feed/markdown)plausibleNot provided
Serves markdown on Accept: text/markdownplausibleNot provided
Interactive elements are semanticplausible64/64 semantic (100%); 0 div/span click targets
Form fields have accessible namesplausibleNot checked — no form fields on the representative page
Inputs carry autocomplete hintsplausibleNot checked — no autocomplete-eligible inputs
WebMCP tools (modelContext API)emergingNot provided
AI retrieval/search fetchers allowed (robots.txt)provenno retrieval-fetcher blocks in robots.txt
Sitemap (indexability)plausibleFound — www.weatherapi.com/sitemap.xml
schema.org JSON-LD in raw HTMLplausibleNot provided
Content-Signal directives (robots.txt)emergingNot provided
Web Bot Auth key directoryemergingNot provided
Discovery Link headers on homepageemergingNot provided
robots.txt AI-crawler accessplausibleno AI-crawler blocks in robots.txt
Unauthenticated API error is structured JSONplausibleNot provided
Unauthenticated API returns auth guidance (401/403 or documented)plausibleNot provided
API exposes rate-limit headersplausibleNot provided
API key obtainable without human interactionplausibleOpenAPI spec published and signup is not SSO-only

Findings

How scoring works →

Interrupt tier: Low-Interrupt — no interrupts found; interrupt score 100 / 100. It alone drives the badge above; the headline Overall score blends it 50/50 with Machine-Readability.

Every tool starts at 100. Each interrupt found subtracts a penalty of base weight × timing × hardness × evidence — the multiplier values below come from the same rubric tables the score is computed with, so the arithmetic in this matrix reproduces the number exactly.

No interrupts found — no penalties, so the score stays at 100.

Score is in the 95–100 band, but the Zero-Interrupt badge additionally requires a completed live Tier-2 transaction and no hard-blocker finding — no live Tier-2 transaction has verified this flow end to end yet, so it is capped at Low-Interrupt.

Checked — nothing found

A check only turns green when a probe tier capable of detecting that interrupt actually ran and found nothing. Not tested ≠ clean.

CAPTCHA / bot-challengeNone found — checked at Tier 0 (passive scan) + Tier 1 (unauth probe)
Email OTP verificationNone found — checked at Tier 1 (unauth probe)
SMS / phone OTP verificationNone found — checked at Tier 1 (unauth probe)
Mandatory phone verification callNone found — checked at Tier 1 (unauth probe)
Mailed physical code (postal)None found — checked at Tier 1 (unauth probe)
“Contact sales” wall (no self-serve path)None found — checked at Tier 0 (passive scan) + Tier 1 (unauth probe)
Manual approval queueNone found — checked at Tier 1 (unauth probe)
ToS clause banning automated/bot accessNone found — checked at Tier 0 (passive scan)
Mandatory redirect to vendor’s own siteNone found — checked at Tier 1 (unauth probe)
SSO-only signup, no API-key issuanceNone found — checked at Tier 1 (unauth probe)
Rate-limit-triggered manual reviewNone found — checked at Tier 1 (unauth probe)
One-time account / payment-method provisioningNone found — checked at Tier 1 (unauth probe)
Identity / KYC verificationNone found — checked at Tier 0 (passive scan) + Tier 1 (unauth probe)
Crypto wallet / key-custody setupNone found — checked at Tier 1 (unauth probe)

Less-interrupting alternatives

Other Developer / Data APIs tools in the same mode (integrated), ranked by Overall LLM-Friendliness — comparable to this listing because they share its usage mode.

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