Inventory a spec's endpoints
API · /openapi-api
OpenAPI Validator API
healthy
3,562 Subscribers
Validate and summarise an OpenAPI / Swagger API definition. Supply the spec inline (?spec=), as a request body, or fetched from a URL (?url=, SSRF-guarded) — in JSON or YAML. The validator detects the version (Swagger 2.0, OpenAPI 3.0.x or 3.1.x), checks the required structure (info.title and info.version, the presence of paths/components, and every operation's responses), and lints for common problems — duplicate or missing operationIds, operations without a summary or description, tags used but not declared, and malformed paths — returning a valid flag, counts of paths, operations, schemas, tags and servers, and separate error and warning lists. A summary endpoint inventories the whole API: every endpoint with its method, path, operationId, summary and tags, plus the declared servers, tags and component schemas. Built for CI gates on API contracts, API-catalogue ingestion, documentation pipelines and design review. An OpenAPI definition validator and linter — distinct from the JSON-Schema validator (jsonschema), the JSON/YAML/XML converters and the on-page HTML/SEO tools. No upstream key, no cache.
api.oanor.com/openapi-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 84 ms
- Server probes · 24h
- Subscribers
- 3,562
- active
- Total calls
- 57
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 2,360 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 2,360 calls/month
- 2 req/sec
- Validate + lint + summary
- No credit card
Starter
€6.85 /month
- 47,000 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 47k calls/month
- 8 req/sec
- Swagger 2.0 + OpenAPI 3.x, YAML
- Email support
Pro
€21.60 /month
- 240,000 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 240k calls/month
- 20 req/sec
- CI contract gates
- Priority support
Mega
€56.50 /month
- 880,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 880k calls/month
- 50 req/sec
- API-catalogue platform scale
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
Sui Validators API
Read the live Sui validator set and staking economics from a public Sui fullnode JSON-RPC — no key. Sui is delegated proof-of-stake; this surfaces what account- and coin-readers miss: the active validators ranked by stake, each with its commission rate, live APY, voting power and staking-pool balance; any single validator's full profile (rewards pool, gas price, metadata); and the current epoch's system state — total stake, validator count, reference gas price, storage fund and epoch timing. The staking-and-validator layer every Sui wallet, staking dashboard, delegator and analytics tool needs to decide where to stake and how the network is secured. Live from the chain; short cache only.
api.oanor.com/suivalidators-api
Programming Languages API
The language definitions GitHub uses to recognise code (the open-source Linguist data) as an API — a clean reference for syntax highlighting, file-type detection, repository dashboards and developer tooling. For each of 800+ languages the API returns its type (programming, markup, data or prose), its brand colour (the hex GitHub paints it), the file extensions associated with it, common aliases, the GitHub language id and the editor (ace) mode. Look a language up by name or alias (golang resolves to Go), reverse-look-up which language(s) own a file extension (.py → Python; .h → C, C++, Objective-C), list the languages of a type, search, or list them all. Distinct from languages-api (ISO 639 human languages) — this is the programming-language reference. Served from memory — always fast.
api.oanor.com/proglang-api
MIME Types API
The canonical MIME / media-type database (the jshttp mime-db used by Express and most of the Node ecosystem: IANA + Apache + nginx), served from memory — no key. Resolve a media type to its file extensions, charset and compressibility; reverse-lookup the media type(s) for a file extension (e.g. png → image/png); and search or list types by source. 2,600+ media types, 1,000+ with file extensions. Lean, predictable JSON. Ideal for upload validation, Content-Type resolution, file-type detection, download handlers and developer tooling.
api.oanor.com/mimetypes-api
MusicBrainz API
The open music-metadata database as an API — artists, release-groups (albums), releases, recordings and labels, identified by stable MusicBrainz IDs (MBIDs), returned as clean JSON. Search any entity by name or Lucene query; look up an artist with their external links and tags, an album, a release with its full track list, a recording with its ISRCs, or a label; and browse an artist's complete discography. Live data with MBIDs, disambiguations, types, countries, life spans, ISRCs, barcodes, catalogue numbers and relations — the canonical identifiers that link and de-duplicate music data across services. Ideal for metadata enrichment and matching, music catalogues, tagging and library tools, and research. 11 data endpoints. Authenticated with an x-oanor-key; fair-use rate limits per plan.
api.oanor.com/musicbrainz-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for OpenAPI Validator API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call OpenAPI Validator API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for OpenAPI Validator API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does OpenAPI Validator API cost?
OpenAPI Validator API has a free tier with 100 calls / month. Paid plans start at €6.85 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is OpenAPI Validator API GDPR-compliant?
All requests to OpenAPI Validator API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/openapi-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/openapi-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/openapi-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/openapi-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
Sign in to rate.
No reviews yet.
Discussion
Ask questions, share usage tips, get answers from the provider and other developers. Public — anyone can read.
Sign in to start a thread or reply.
Sign inNew thread
📌 Pinned
🔒 Locked
·
·
·
-
Provider answer
🔒 This thread is locked — no new replies.
-
·
- No threads yet — start the discussion.
Support
Private 1:1 support with the provider — billing questions, integration issues, account problems. Only you and the provider team can see these threads.
Sign in to open a support ticket.
Sign inOpen new ticket
Describe what you need help with. The provider team gets an email and replies on the ticket page.
-
·
Urgent - No tickets yet for this API.