information-retrieval

Stack Exchange question search with score, answer count and whether an answer was accepted

Parse an RSS/Atom feed into structured items (title, link, published, summary) — or auto-discover the feed from a site URL

Lemmy (fediverse link aggregator) posts from an instance or a single community, with score and comment counts

Score up to 100 texts with a transparent deterministic positive and negative keyword lexicon.

Create a deterministic extractive summary by ranking and selecting sentences from the supplied text.

Screen a party name against the current official U.S. Treasury OFAC SDN primary-name list and return transparent potential matches.

Check any hostname's DNS records — A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, or PTR — along with whether DNSSEC validates, returned as structured JSON with name, type, TTL, and data for each answer. Built for domain-verification flows, email setup diagnostics, and security-monitoring agents. Cached 5 minutes per query.

Check whether an email address is well-formed and its domain can actually receive mail — RFC-style syntax check plus a live MX (falling back to A) lookup — returning the parsed domain, sorted mail hosts, and a deliverable flag. Answers "is this email address real" and "will mail sent here bounce" without probing the mailbox itself. Use for lead cleaning, signup validation, and contact verification. Nothing stored.

Email domain verification API: syntax check plus live mail-server (MX) lookup for any address, returning sorted mail hosts and a deliverable flag, as JSON. Flags dead domains before you send. Mailbox existence is not probed; nothing is stored.

Social share metadata lookup: reads a web page's title, canonical link, favicon, author, and social-card tags (Open Graph and Twitter formats) and returns them as one normalized JSON object. Safe against internal-address requests. Handy for SEO checks, content management systems, and any tool that needs to know how a URL will look when shared.

Formats any phone number into its E.164 canonical form plus national and international display formats, detecting the country and line type, mobile vs landline where determinable, from messy human input. For CRM cleanup, signup forms, and dialing systems that need one consistent format instead of guessing at punctuation.

Query mail server (MX), address (A/AAAA), text (TXT), or any other DNS record type for a hostname, with DNSSEC validation status and the full set of returned records — name, type, TTL, and data — as JSON. Useful for checking email deliverability setup, verifying domain ownership, and infrastructure monitoring. Results cached 5 minutes.

Look up a country by name or its 2- or 3-letter ISO code and get capital, currencies, official languages, calling code, region, land area, bordering countries, and flag emoji in one normalized object. Handy for onboarding forms, compliance checks, and shipping-rule engines that key off ISO codes rather than free-text country names.

Checks whether an email address is well-formed and whether its domain actually has working mail servers, returning the parsed domain, the sorted list of mail hosts, and a deliverable flag. Doesn't probe the specific mailbox, only the domain's mail setup. Built for lead-list cleaning and signup-form validation agents. Nothing is stored.

Looks up normalized package metadata from the Python Package Index, version, dependencies, license, homepage, and yank/deprecation status, trimmed down from the much larger raw index response. For agents auditing or generating requirements files before running pip install.

Country reference data keyed by name or ISO code — currency, capital, languages, calling code, region, area, and neighboring countries — returned as one clean JSON object. Useful for populating currency selectors, tax jurisdiction logic, and data-enrichment pipelines without hardcoding a static country table.

Returns the latest version, summary, license, and required Python version constraint for any package on the Python Package Index, plus its declared dependencies and yank status. A quick pre-install check for coding agents working in Python before they commit to a dependency.

Search posts within one subreddit (not site-wide — use reddit.search.list for that).

Keyword search over the retained multi-day news archive (scanned span reported in depth + freshness.coverage) — AND-ed terms plus quoted phrases over title + summary + domain + categories, source/lang/date filters, recency or relevance sort, up to 100 per call

DNS lookup — Resolve DNS records via DNS-over-HTTPS.

Track newly published US regulations by keyword: the latest proposed and final rules, notices, and presidential documents mentioning your topic, with issuing agency, publication date, abstract, and official document links as structured JSON. Regulatory early-warning for compliance and market agents.

Fetches a public file URL, up to 50MB, and returns its SHA-256, SHA-512, SHA-1, or MD5 digest so you can confirm a download matches its published checksum before trusting it. A supply-chain safety step for agents pulling packages, models, or binaries from the open web.

Public GitHub facts: repo stats with latest release, a user/org profile, or a star-ranked repo search

Resolve current DNS records and fetch public RDAP registration metadata for a domain.