Feature
Sandbox Environment
A safe test environment with fake data.
49 providers
445 APIs
33 declared variants
A dedicated sandbox or test mode with synthetic data lets teams build and test without touching production or moving real money. Usually the gate on how fast an integration can be certified.
49 API providers on the APIs.io network offer sandbox environment. The highest-rated are Salesforce, Stripe, Anthropic, Plaid, Postman.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 9 Complete, well-documented, and agent-ready
SalesforceSalesforce is a cloud-based customer relationship management (CRM) platform that provides a comprehensive s...StripeOnline payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce f...AnthropicAnthropic is an AI safety company and the creator of the Claude family of large language models (Opus, Sonn...PlaidPlaid is a US financial-technology company and data-network aggregator that provides an API platform for bu...PostmanPostman is the world's leading API platform, used by 35+ million developers to design, build, test, documen...MergeMerge is the connective infrastructure for production AI. The Merge Unified API offers one API surface acro...AvalaraAvalara helps businesses of all sizes get tax compliance right. We deliver cloud-based solutions that work ...Token.ioToken.io is an Open Banking infrastructure provider offering A2A (Account-to-Account) payments and account ...PaystackPaystack is an African payment processor (acquired by Stripe in 2020) that lets businesses accept payments ...
Strong 12 Solid coverage with minor gaps
Commerce LayerCommerce Layer is the headless, multi-market commerce API used by global brands to sell everywhere — web, m...FireblocksFireblocks is an institutional digital-asset and stablecoin infrastructure company providing MPC-secured cu...Apollo.ioApollo.io is a sales intelligence and go-to-market platform combining a database of 240M+ contacts and 30M+...DeelDeel is a global workforce platform combining payroll, Employer of Record (EOR), independent contractor man...PropelAuthPropelAuth is a B2B SaaS authentication and multi-tenant user management platform purpose-built for organiz...AgaveAgave is a unified API platform for the construction industry, enabling software companies and contractors ...OloOlo is a leading on-demand commerce platform powering the digital experience for restaurant brands, serving...MewsMews is a cloud-native hospitality operating system serving 15,000+ hotels, hostels, and vacation-rental pr...IntuitCollection of APIs offered by Intuit for financial and business management services.ApidogApidog is an all-in-one API development platform that connects the entire API lifecycle: visual API design,...emnifyemnify is a cloud-native global IoT cellular connectivity provider operating its own mobile core and SuperN...InterswitchInterswitch is Nigeria's foundational digital payments and transaction-switching company, founded in 2002 a...
Developing 14 Usable, with meaningful gaps to close
MoniepointMoniepoint is Africa's all-in-one financial platform for small and medium-sized businesses and individuals ...FactorialFactorial is an all-in-one HR, payroll, time, talent, finance, and IT management platform headquartered in ...TrueworkTruework operates a unified income and employment verification platform for mortgage lenders, credit unions...UpvestUpvest is a Berlin-based API-first investment infrastructure provider that enables banks, brokers, and weal...MockarooMockaroo is a realistic mock data generator and API mocking service used by developers and QA teams to prod...Amazon Mechanical TurkAmazon Mechanical Turk (MTurk) is a crowdsourcing marketplace that makes it easier for individuals and busi...UberUber is a global technology platform offering transportation, food delivery, and logistics services. Its de...StackOneStackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel...Apollo ConfigApollo is a reliable, open-source configuration management system suitable for microservice configuration m...ApiaryApiary is an API design and documentation platform, now part of Oracle Cloud Infrastructure. With 486,000+ ...Amazon Cloud MapAmazon Cloud Map is a cloud resource discovery service that maintains an updated registry of application re...BlockBlock, Inc. is a global technology company building economic empowerment tools through a family of products...LoadsmartLoadsmart is a digital freight technology company and 4PL that connects shippers, carriers, warehouses, and...API BlueprintAPI Blueprint is a high-level API description language using Markdown-based syntax for designing, documenti...
Thin 9 Limited public surface area
Bank of AmericaBank of America is a multinational investment bank and financial services holding company providing consume...DexcomDexcom is a leading medical device company that develops, manufactures, and distributes continuous glucose ...BeeceptorBeeceptor is an API mocking, HTTP debugging, and proxy platform that lets developers create mock servers in...OlaOla is India's leading ride-sharing and mobility platform operating across 100+ cities in India and interna...AmbassadorAmbassador is a Kubernetes-native API Gateway built on Envoy Proxy, providing routing, load balancing, auth...PaysafePaysafe is an integrated payment platform providing businesses with REST APIs for online payments, digital ...BNY MellonBNY Mellon is a global investments company providing asset servicing, asset management, wealth management, ...OPayOPay is a Nigerian mobile money and fintech super-app operated by Blue Ridge Microfinance Bank (OPay Digita...BBVABBVA is a multinational Spanish financial services group operating in over 30 countries. The BBVA API Marke...
Emerging 4 Early or largely undocumented
APIGitAPIGit is a Git-native platform for full lifecycle API development that combines version control, API desig...OpenTableOpenTable is a global restaurant reservation platform owned by Booking Holdings. The OpenTable Partner Port...EcologiEcologi is a Bristol, UK climate action platform and B Corp founded in 2019 that lets individuals and busin...HostfullyHostfully is a San Francisco-based short-term rental (STR) property management platform serving vacation re...
Minimal 1 Almost no public developer surface
What Providers Actually Declared
This feature is a canonical term. These are the free-text strings
providers wrote in their own apis.yml that map onto it.
100 RPS read/write in live mode, 25 RPS in test mode60-day or unlimited sandbox accessAPI MockingAPI Mocking with BlackbirdClaude Haiku 4.5 — fastest model with near-frontier intelligenceDynamic Mock ServerFactory Test Mode (FTM) — 100 KB data and 10 SMS free per SIM for pre-production validationFree for personal mock APIs (1 endpoint, 50 requests/day). Paid plans from $10/mo.Mock APIsMock Server GenerationMock ServersMulti-Environment SupportMulti-environment: live and test environments with separate rate limitsNo sandbox host and no test mode — testing happens against production with a real keyProduction and Demo environments (api.factorialhr.com vs api.demo.factorialhr.com)Production environment at `https://api.mews.com`, demo environment at `https://api.mews-demo.com` with free test credentialsSandbox EnvironmentSandbox EnvironmentsSandbox environment at `sandbox.interswitchng.com` and `qa.interswitchng.com` with public test credentialsSandbox environment at api-sandbox.demo.deel.com with pre-populated test workersSandbox environment at dashboard.sandbox.token.ioSandbox environment at https://api.truework-sandbox.com with deterministic test SSN fixturesSandbox environment at sandbox.monnify.com with separate API key / secret pairSandbox environment for partner integration testing prior to production approvalSandbox environment with pre-funded test assets and communal test co-signerSandbox environment with synthetic dataSandbox environments (Developer/Partial/Full)Sandbox environments for both API surfacesSeparate staging environment included on Growth tier and aboveTest ModeTest environment at api.test.paysafe.comTest mode via "test"unitree_mujoco — MuJoCo simulation environment
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Work with this as data
Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.