Business APIs cover company data, market research, and operational tools. Access business registrations, financial reports, and industry data to power enterprise applications and analytics dashboards.
Last verified: November 12, 2026
| Name | Description | Auth | HTTPS | CORS | Uptime (30 days) |
|---|---|---|---|---|---|
| Apache Superset | API to manage your BI dashboards and data sources on Superset | apikey | Yes | yes | 100% (5 checks) |
| ArvanCloud | Enables you to use ArvanCloud services | apikey | Yes | no | 100% (5 checks) |
| CarbonSutra - Carbon Footprint Estimation for Organizations | Carbon footprint for business travel, hotel stays, vehicles, freight, shipments, fuel and electricity with supplementary APIs on airports and locations | none | Yes | no | unknown |
| Charity Search | Non-profit charity data | apikey | No | unknown | 100% (5 checks) |
| Chatway | Live-chat and support API for conversations, messages, contacts and webhooks. Included in the free plan (50 conversations per month). | apikey | Yes | unknown | 100% (5 checks) |
| Clearbit Logo | Search for company logos and embed them in your projects | apikey | Yes | unknown | 100% (5 checks) |
| Compabase | Polish company data: 3M+ KRS and CEIDG entities with financial statements, people and rankings | apikey | Yes | unknown | 100% (5 checks) |
| Company Enrichment | Domain, URL or email to company name, industry, size, HQ, tickers and socials, 125k companies | apikey | Yes | no | 100% (4 checks) |
| CompanyEnrich | API for B2B company data enrichment, domain enrichment, and website enrichment | apikey | Yes | yes | 100% (5 checks) |
| Crustdata | People and company data covering profiles, headcount, funding and contacts | apikey | Yes | unknown | 100% (5 checks) |
| Dievio | B2B contact search and LinkedIn profile URL lookup using prepaid API credits | apikey | Yes | no | 100% (2 checks) |
| EnrichGrid | LinkedIn profile and company scraper API: person, company and school data as JSON, plus people search | apikey | Yes | no | 100% (2 checks) |
| Firmbase | Belgian company register (KBO/CBE), Official Gazette notices and VAT validation | apikey | Yes | yes | 100% (4 checks) |
| Freelancer | Hire freelancers to get work done | oauth | Yes | unknown | 100% (5 checks) |
| Funding Signals | Companies that just raised funding, scored as sales leads, from public SEC filings | apikey | Yes | no | 100% (5 checks) |
| GlobalEntity | Official company data from 56 European business registers as normalized JSON | apikey | Yes | yes | 100% (5 checks) |
| Gmail | Flexible, RESTful access to the user's inbox | oauth | Yes | unknown | 100% (5 checks) |
| Google Analytics | Collect, configure and analyze your data to reach the right audience | oauth | Yes | unknown | 100% (5 checks) |
| gstinapi | Verify Indian GST numbers (GSTIN): legal name, status, address and return filing history; free tier | apikey | Yes | no | 100% (5 checks) |
| Instatus | Post to and update maintenance and incidents on your status page through an HTTP REST API | apikey | Yes | unknown | 100% (5 checks) |
| Invovate | Generate PDF, JSON & UBL invoices in 11 languages from one JSON POST | apikey | Yes | no | 100% (5 checks) |
| Katalis UK Company Enrichment | Verified UK company profiles with an AI summary and accuracy score, from Companies House data | apikey | Yes | unknown | 100% (5 checks) |
| KontragentPro | Russian company data from state registers by INN or OGRN: profile, finances, timeline | none | Yes | yes | 0% (5 checks) |
| Leadgen Romania | Romanian company registry, ANAF tax status and financial statements | apikey | Yes | yes | 100% (5 checks) |
| Legal Sandbox Georgia | Find verified legal specialists in Georgia from natural-language queries | none | Yes | yes | 100% (5 checks) |
| Listings API | Manage business locations, sync listings across publishers, respond to reviews, publish posts, and pull local search analytics | apikey | Yes | unknown | 100% (5 checks) |
| Logo.dev | Automated company logo API that updates daily. Transform any domain or company name into verified logos. | apikey | Yes | yes | 100% (5 checks) |
| Logoapi | Free SVG company logos by domain, plus search by name. No signup | none | Yes | yes | 100% (4 checks) |
| logoapi.sh | Company logo as SVG by domain, with name search and white, black, grey and dark variants. No key or signup. Free for 1M requests a month per site | none | Yes | yes | 100% (5 checks) |
| LogoKit | Logo API for brands, stocks, and cryptocurrencies | apikey | Yes | unknown | 100% (5 checks) |
| Mailchimp | Send marketing campaigns and transactional mails | apikey | Yes | unknown | 100% (5 checks) |
| mailjet | Marketing email can be sent and mail templates made in MJML or HTML can be sent using API | apikey | Yes | unknown | 100% (5 checks) |
| markerapi | Trademark Search | none | No | unknown | 100% (5 checks) |
| Meirra | SEO monitoring, email verification, lead generation, and marketing analytics | apikey | Yes | yes | 100% (5 checks) |
| Mydentify | Structured software directory listings and weekly product leaderboards as JSON, described by an OpenAPI 3.1 spec. | none | Yes | yes | 100% (5 checks) |
| NioLeads | LinkedIn Email Finder and Email Verifier | apikey | Yes | yes | 100% (5 checks) |
| PeopleSearch | People and company search in plain English, with verified work emails and email verification | apikey | Yes | no | 100% (5 checks) |
| Pick an Agency | Search 47,000+ marketing agencies by service, location and rating | none | Yes | yes | 100% (5 checks) |
| Project Cost Estimator | Cost, timeline and complexity estimates for website, ecommerce and app projects | apikey | Yes | yes | 100% (5 checks) |
| RankFabrik Places | Search businesses and points of interest by city, deduplicated with a coverage report | apikey | Yes | unknown | 100% (5 checks) |
| Redash | Access your queries and dashboards on Redash | apikey | Yes | yes | 100% (5 checks) |
| RegisterWire | Real-time alerts on UK company register changes | apikey | Yes | no | 100% (5 checks) |
| Requstory | How companies work: teams, processes, ease scores and AI-readiness from public websites | apikey | Yes | yes | 100% (4 checks) |
| RestoSignals | US restaurants and bars 1-6 months before opening, fused from liquor-license, food-permit and business filings and scored | apikey | Yes | no | 100% (5 checks) |
| RunDossier | Pre-meeting briefing on a person from public professional and web sources, as JSON | apikey | Yes | no | 100% (5 checks) |
| Seller Fee | Marketplace and payment fees for Gumroad, Etsy, Stripe and PayPal with net payout breakdowns | none | Yes | yes | 100% (4 checks) |
| Skael | German commercial register data, new registrations, Google Maps businesses and job boards as B2B lead lists with verified work emails | apikey | Yes | yes | 100% (4 checks) |
| Smartsheet | Allows you to programmatically access and Smartsheet data and account information | oauth | Yes | no | 100% (5 checks) |
| Softoteca | Catalog of Brazilian software with the source of each data point and prices in BRL | none | Yes | yes | 100% (5 checks) |
| Square | Easy way to take payments, manage refunds, and help customers checkout online | oauth | Yes | unknown | 100% (5 checks) |
| SwiftKanban | Kanban software, Visualize Work, Increase Organizations Lead Time, Throughput & Productivity | apikey | Yes | unknown | 100% (5 checks) |
| Tenders in Hungary | Get data for procurements in Hungary in JSON format | none | Yes | unknown | 0% (5 checks) |
| Tenders in Poland | Get data for procurements in Poland in JSON format | none | Yes | unknown | 0% (5 checks) |
| Tenders in Romania | Get data for procurements in Romania in JSON format | none | Yes | unknown | 0% (5 checks) |
| Tenders in Spain | Get data for procurements in Spain in JSON format | none | Yes | unknown | 0% (5 checks) |
| Tenders in Ukraine | Get data for procurements in Ukraine in JSON format | none | Yes | unknown | 0% (5 checks) |
| Tomba email finder | Email Finder for B2B sales and email marketing and email verifier | apikey | Yes | yes | 100% (5 checks) |
| ToolCompare | Software pricing for 512 tools with the source URL and the date each price was read | none | Yes | yes | 100% (5 checks) |
| TradeData | Global customs manifest and bill of lading APIs across 10 sovereign nations | apikey | Yes | yes | 100% (5 checks) |
| TradeDataHub | U.S. contractor datasets with a free discovery API for coverage, pricing and masked previews | none | Yes | yes | 100% (5 checks) |
| Trello | Boards, lists and cards to help you organize and prioritize your projects | oauth | Yes | unknown | 100% (5 checks) |
| Trends API | Search, social and shopping trend data as JSON: Google Trends, TikTok, YouTube, Amazon, Reddit and more | apikey | Yes | no | 100% (5 checks) |
| TrendsAGI | Trending topic volume, velocity and growth with AI insights; free plan of 100 calls/day | apikey | Yes | no | 100% (5 checks) |
| UGC VZ | Directory of DACH user-generated-content creators with topics, cities, rates and contact requests | none | Yes | no | 100% (5 checks) |
| UN Comtrade | Official international trade statistics: imports and exports by country and product from the United Nations. Free key tier, plus a keyless preview. | apikey | Yes | no | 100% (3 checks) |
| Verif Entreprise FR | French company checks by SIREN: status, insolvency (BODACC), VAT (VIES); free preview | none | Yes | yes | 100% (5 checks) |
| Village | Person and company enrichment plus warm introduction paths through your network | apikey | Yes | yes | 100% (5 checks) |
| VNCNT Labs Trademark Checker | Check product titles, tags and slogans against about 4.4M live USPTO trademarks by class, with risk level, owner and serial number | apikey | Yes | yes | 100% (5 checks) |
| W System EU Business Data | EU VAT (VIES) and EORI validation, company registers, EU/UN/OFAC/UK sanctions screening | none | Yes | yes | 100% (5 checks) |
| Zaptu | Remote MCP server and REST API that send consented contact requests to local US home-service pros (plumbing, cleaning, pest). Not a booking | none | Yes | yes | 100% (4 checks) |
| Zillapi | US property data API — Zestimate, photos, taxes, price history | apikey | Yes | yes | 100% (5 checks) |
21 of these APIs require no authentication — you can start making requests immediately without signing up for an account. Just pick one from the table above, check its documentation, and send your first request.
44 APIs in this category require a free API key. This usually means creating a free account on the provider's website and copying your key from the dashboard. The process typically takes less than a minute.
Not sure where to start? Check the uptime column: it shows how often each API's documentation responded to our daily checks over the last 30 days, and the dot shows whether it responded at the latest check. For browser-based projects, check that the API supports CORS.
Yes, all APIs listed on API Bouncer have a free tier. Some are completely open (no sign-up needed), while others require a free account to get an API key. Free tiers typically have rate limits — check each API's documentation for specifics.
It depends on your needs. Consider: Do you need authentication or prefer no-auth? Does your project need CORS support for browser access? How many requests will you make? Start with a no-auth API to prototype quickly, then switch to a more feature-rich option if needed.
We run periodic health checks on all listed APIs. The "Status" column shows whether each API was responding at our last check. APIs marked as "alive" were recently verified. You can also test any API yourself using curl or our guides on testing APIs.
Most free APIs allow commercial use, but terms vary by provider. Always check the specific API's terms of service. Some APIs have separate free and commercial tiers with different rate limits.
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