canonical · -0.1 personacapability

Developer Tools

Score 37.6 / 100 988 providers +38 via APIs 196 APIs Search apis.io →

Business capabilities this tag reaches

Developer Platform & API Ecosystem Management 1

Providers using this tag (988)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 44 Complete, well-documented, and agent-ready

AhaSendEmailTransactional EmailSMTP2 APIs84.3 GitHub ActionsCI/CDContinuous IntegrationContinuous DeploymentDevOps1 API82.8 GitLabCodePlatformSoftware Development13 APIs80.8 LaunchDarklyFeature FlagsFeature ManagementExperimentationObservability3 APIs80.8 GitHubCodePipelinesPlatform38 APIs80.3 SentryAPMApplication MonitoringBug Tracking21 APIs80.0 FlagsmithFeature FlagsRemote ConfigRelease ManagementA/B Testing2 APIs78.5 BugsnagMonitoringObservabilityError MonitoringApplication Performance Monitoring5 APIs78.4 Ironfangscreenshot-apiwebsite screenshotHTML to PDF7 APIs78.2 StatsigFeature FlagsExperimentationA/B TestingProduct Analytics4 APIs76.7 Azure DevOpsAgileCI/CDDevOps11 APIs76.3 Anysphere Cursor AiCompanyArtificial IntelligenceCoding1 API75.1 FormfeedPDFImage GenerationTemplates2 APIs75.1 PlunkEmailTransactional EmailMarketingAutomation2 APIs75.1 AkuityGitOpsContinuous DeliveryKubernetesArgoCD8 APIs72.9 CloudBeesCI/CDContinuous DeliveryContinuous Integration5 APIs72.8 PrismaDatabasePostgreSQLORM7 APIs72.7 HiltPaymentsSolanaStablecoinsUSDC4 APIs72.4 DrippayCompanyBillingUsage-Based BillingMetering1 API72.0 StoplightAPI DesignAPI DocumentationAPI GovernanceAsyncAPI2 APIs71.8 ScalarAPI ClientAPI DocumentationAPI ReferenceCode Generation2 APIs71.7 JFrogArtifactoryCI/CDContainer Registry14 APIs71.6 NetlifyCDNCloudContinuous Deployment2 APIs71.5 LoopsEmailEmail APIMarketing AutomationTransactional Email1 API71.4 PrismicGraphQLHeadless CMSContent ManagementPage Builder8 APIs71.1 ArchbeeAPI DocumentationDocumentation PlatformKnowledge BaseTechnical Writing11 APIs70.9 Cracked APIAI AgentsAgent ToolsMCPTool Router2 APIs70.3 Amazon API GatewayAPI GatewayCloudRESTHTTP13 APIs70.0 BitbucketAtlassianCI/CDCode CollaborationCode Review1 API70.0 LaravelCompanyCloud SaasPHP2 APIs69.5 Edge ImpulseArtificial IntelligenceMachine LearningEmbedded Machine LearningEdge AI2 APIs69.4 MailosaurEmail TestingSMS TestingQA Automation1 API69.2 rtcStatsWebRTCObservabilityMonitoringDebugging2 APIs69.2 MailboxlayerEmailEmail VerificationSMTPMX Records2 APIs68.9 Progress SoftwareCompanyEnterprise SoftwareManaged File TransferInfrastructure Automation3 APIs68.9 APILayerAPI MarketplaceAPI CatalogAPI Discovery6 APIs68.2 GitDealFlowVenture CapitalDeal FlowStartupsGitHub2 APIs68.1 Microsoft .NET.NETC#CloudCross-Platform10 APIs67.7 CircleCICI/CDContinuous IntegrationContinuous DeploymentDevOps2 APIs67.6 TranscriptFetchTranscriptsSpeech-to-TextCaptionsYouTube2 APIs67.6 Blnk FinanceFintechFinancial ServicesLedgerdouble-entry-accounting1 API67.4 Context.devWeb ScrapingBrand IntelligenceData EnrichmentAI Agents1 API67.2 AppsmithLow-CodeOpen SourceInternal ToolsWorkflow Automation1 API66.9 MoesifAnalyticsMonitoringMonetizationGovernance2 APIs66.9

Strong 93 Solid coverage with minor gaps

Developing 277 Usable, with meaningful gaps to close

Thin 252 Limited public surface area

Emerging 207 Early or largely undocumented

Minimal 115 Almost no public developer surface

APIs with this tag (185)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 9 Complete, well-documented, and agent-ready

Kong InsomniaKong Insomnia is an open-source API development platform for designing, debugging, and testing APIs. It sup...73.2 Scalar Agent and MCPAI layer that lets developers chat with an API inside the docs and exposes hosted MCP (Model Context Protoc...71.7 Scalar API ClientScalar API Client is a fully open-source, offline-first REST API client built on the OpenAPI standard. Supp...71.7 Scalar CLIThe Scalar CLI is a command-line interface for managing OpenAPI files, generating documentation, running mo...71.7 Prismic Types APIThe Types API reads and writes a repository's content models — custom types and Slice Machine shared slices...71.1 Mailboxlayer Email Validation APIREST/JSON API for real-time email validation: syntax check, typo suggestions, MX-record lookup, SMTP verifi...68.9 .NET CLICross-platform command-line interface for developing, building, running, and publishing .NET applications. ...67.7 Blnk Cloud APIManaged Cloud REST surface covering OAuth auth, a Proxy API to a Core instance, Data API, Filters API, Aler...67.4 Blnk Watch APIRule-based transaction monitoring API (transaction evaluation, instruction management, Git-backed rule sync...67.4

Strong 20 Solid coverage with minor gaps

Singular Testing Console APIBETA integration-testing API. Register a real test device to open a one-hour logging session, then read bac...65.8 Lacuna MCP ServerHosted Model Context Protocol server (Streamable HTTP) at https://www.lacuna.fm/mcp, protocol 2025-06-18. i...64.9 Treblle Aspen API TestingAspen is Treblle's intelligent API testing application for macOS featuring AI-powered capabilities through ...63.2 APIVerve GraphQL API (alpha)Single GraphQL endpoint that fans out to multiple APIs in one request. Explicitly labeled alpha / not for p...60.8 APIVerve MCP ServerHosted remote MCP server (streamable HTTP) exposing every catalog endpoint as individual MCP tools with inp...60.8 Ablo Integration-Helper MCP ServerA public, anonymous, stateless Streamable-HTTP MCP server Ablo runs on its own domain so an AI coding assis...59.9 Chainstack Faucet APIPublic Chainstack-operated testnet faucet for Hoodi, Sepolia, BNB Testnet, zkSync Testnet, Scroll Sepolia, ...59.6 Safari Developer Tools APIAPIs and tools for inspecting, debugging, and optimizing web content in Safari, including Web Inspector and...59.5 Redis InsightRedis Insight is a free GUI management tool for Redis. Provides database browsing, query execution, memory ...59.4 Amazon Q Developer in Chat Applications APIAPI for Amazon Q Developer in chat applications, which enables integration of Amazon Q Developer capabiliti...58.6 Waxell Developer MCP ServerWaxell Developer MCP is a hosted Model Context Protocol server that lets coding agents (Claude Code, Cursor...58.0 APIFreaks MCP ServerOfficial first-party Model Context Protocol server (Apache-2.0) exposing 59 read-only tools across 13 categ...57.9 ReefAPI Developer Tools APIThe Developer Tools API from ReefAPI — 263 operation(s) for developer tools.57.7 Formboost Form Submission APISingle public unauthenticated HTTP endpoint (POST https://formboost.app/f/{alias}) that accepts JSON or for...57.6 Keploy MCP ServerHosted, remote Model Context Protocol server (streamable HTTP, bearer kep_ PAT auth) at https://api.keploy....57.0 thirds.ai MCP ServerHosted MCP server exposing thirds.ai tools (create_brand_kit, create_template, edit_template, publish_templ...56.4 Fasten ToolboxStandalone FHIR-based developer tools derived from the main Fasten platform, including catalog browsing, di...56.1 agentsmd (agentcontext) APILive, free, unauthenticated endpoint behind the agentsmd wedge: POST /normalize accepts {source_format, con...55.2 stripesig Webhook Signature Debugger APILive, free, unauthenticated endpoint behind the stripesig wedge: POST /check accepts {provider (stripe|gith...55.2 Kore.ai Arch MCP ServerA stdio Model Context Protocol server, @koreai/arch-mcp-tools, that exposes the Kore.ai Agent Platform cont...54.8

Developing 43 Usable, with meaningful gaps to close

Anaconda MCPAnaconda's Model Context Protocol surface for AI coding agents. `anaconda-mcp` is a unified local gateway t...53.9 WordPress VIP Platform APIThe GraphQL API for WordPress VIP, Automattic's enterprise WordPress and Node.js platform. Documented opera...53.9 WordPress.com MCP ServerAutomattic's hosted Model Context Protocol server for WordPress.com. Streamable HTTP transport secured with...53.9 Temenos Explorer APIAPIs for the Temenos Explorer framework, providing an API gateway for server-to-server API calls with Keycl...53.4 Open Poker WebSocket Game APIWebSocket gameplay protocol (V2) at wss://openpoker.ai/ws. Client sends join_lobby, action, rebuy, leave_ta...53.1 CrawlGraph MCP ServerHosted remote Model Context Protocol server at https://crawlgraph.com/mcp over Streamable HTTP, plus an ope...52.7 Encore MCP ServerEncore ships a built-in Model Context Protocol server (`encore mcp start` for SSE, `encore mcp run` for std...52.5 Warp Enterprise Analytics APIThe Enterprise Analytics API provides team usage metrics and administrative insights for Enterprise plan cu...52.1 Warp Oz CLIThe Oz CLI is a command-line interface for interacting with the Warp Oz agent platform. It allows developer...52.1 Jam MCP ServerHosted Model Context Protocol server that pipes a Jam's recording, console logs, network requests, user eve...52.0 Bruno API ClientThe core open-source, git-native desktop API client (a lightweight Postman/Insomnia alternative). Compose a...51.9 Bruno CLI (bru)The @usebruno/cli command-line runner (invoked as bru, installed via npm install -g @usebruno/cli) executes...51.9 MCP Server (local)Documentation for the @featureflip/mcp server, a local stdio process run via npx that calls the Management ...51.7 TypeSafe AI Documentation MCP ServerHosted, anonymous, read-mostly MCP server over the published TypeSafe documentation corpus. Three tools: se...51.6 TweetAPI Hosted MCP ServerHosted remote HTTP MCP server providing current TweetAPI docs and read-only live public-data tools. Uses OA...50.8 TweetAPI tw-v2 REST APIREST API for public Twitter/X data with X-API-Key auth, JSON responses, and 76 documented endpoints across ...50.8 Spec Scoring APIPublic, no-auth REST API for scoring OpenAPI documents. GET /api/review/checks returns the full set of chec...50.5 Linktree Arbor RegistryArbor is Linktree's design system, published as a public HTTP component registry. Anonymous, unauthenticate...50.0 npm CLIThe npm CLI is the official command-line interface for the npm package manager, providing developers with t...49.8 Knative CLI (kn)The Knative CLI (kn) provides a command-line interface for creating and managing Knative resources includin...48.4 VNC Developer SDKCross-platform SDK for embedding VNC Viewer and Server functionality into applications. Available for C, Ja...47.1 KUAE Cloud Coding Plan APIAn LLM inference endpoint operated on Moore Threads MTT S5000 GPUs and sold as a subscription for AI coding...46.3 RWTH GitLab REST API (self-hosted)The RWTH IT Center self-hosts a GitLab instance at git.rwth-aachen.de used across the university's institut...45.9 Kimetsu MCP Server (local stdio)The memory product's agent surface: `kimetsu mcp serve` exposes ~28 kimetsu_* tools (context retrieval, les...44.4 ToAPIs APIOpenAI-compatible REST API covering chat/completions, image generation, video generation, and model listing...44.3 FreeTTS REST APIREST/JSON API for text-to-speech synthesis, audio and SRT subtitle download, and voice listing. Uses x-api-...43.4 Stellary MCP ServerHosted remote MCP server (streamable HTTP) exposing board read/write, cockpit supervision, agent runtime, a...43.3 Stellary REST APIREST API at the application root covering auth/identity, organizations/workspaces/projects, delivery (cards...43.3 Trellix API ExplorerInteractive API documentation and testing tool for Trellix security products formerly under the FireEye bra...43.3 Swytchcode Documentation & Agent SurfacesSwytchcode's publicly consumable surfaces: developer documentation and a published llms.txt. The primary in...43.1 wasmCloud wash CLIwash (WAsmcloud SHell) is the comprehensive command-line tool for developing, building, deploying, and mana...42.5 Rosentic Dashboard Feed APIThe Bearer-key REST surface documented on the orchestrator-integration page for wiring Conductor, Claude Sq...42.2 Sideko CLIThe Sideko CLI is a Rust binary (current release v1.6.3, Aug 2025) that provides command-line access to the...41.9 Image CDNToken-authenticated global image CDN delivering car logos in full, badge, and wordmark variants across mult...41.7 JSON APIBearer-authenticated REST/JSON API for listing brands and retrieving full brand detail including color pale...41.7 MCP ServerHosted streamable-HTTP MCP server exposing read-only brand tools, account tools, resources, and prompts. Au...41.7 TronZap REST APIREST API for TRON Energy and Bandwidth rental, energy subscriptions, and AML crypto checks. Endpoints inclu...41.2 TronZap Wallet Orders APIFully public, unauthenticated Orders API for non-custodial wallet integrations. Four operations — POST /v1/...41.2 Stainless CLIThe Stainless CLI generates production-ready command-line interfaces from an OpenAPI specification. Generat...41.1 ReqKey REST APIREST API for API key management, usage credits/metering, rate limiting, and traffic analytics. POST/JSON en...40.7 Spocket MCP ServerHosted MCP server (Streamable HTTP) with ~20 tools for deploying and managing always-on apps. Uses OAuth 2....39.9 Spocket Platform REST APIWhite-label reseller/provisioning REST API for hosting apps from a customer backend. OAuth2 client-credenti...39.9 Glia Functions APIGlia Functions is a serverless JavaScript runtime (workerd) inside the Glia platform, with REST endpoints f...39.7

Thin 86 Limited public surface area

Ciena Emulation Cloud APICiena Emulation Cloud is an open application development environment enabling developers to create, test, a...38.1 OgenThe ogen code generator. Invoked as a build-time CLI against a local OpenAPI v3 document — `ogen [options] ...38.1 Spree Dev ToolsInternal developer tooling for working on Spree itself - debuggers, profilers, dummy data generators, and h...37.8 Kyverno CLIThe Kyverno CLI provides a command-line interface for applying and testing Kyverno policies against Kuberne...37.4 Falco Plugin APIThe Falco Plugin API provides a C ABI interface for developing plugins that extend Falco with new event sou...36.8 Thunder Compute CLI (tnr)The tnr command-line interface is the primary developer surface for Thunder Compute, wrapping the REST API ...36.2 Triplit CLICommand-line interface tool for scaffolding Triplit projects, running the local full-stack development envi...35.9 Vynaris Gateway APIREST API in OpenAI Chat Completions wire format. Primary endpoint POST /v1/chat/completions with SSE stream...35.3 EasyAR CRS Web Service APIREST/HTTP API for cloud image recognition: target management endpoints (/targets/, /target/, /grade/detecti...34.9 Crank Storyboard APIsThe public API reference for Crank Storyboard, the embedded graphical-interface development platform AMETEK...34.1 WeaveAPI OpenAI-compatible APIOpenAI-wire-compatible REST API for chat completions, responses-style requests and the model catalog, authe...34.0 SiFive Cloud Services OAuth 2.0The OAuth 2.0 authorization server that fronts the SiFive Cloud Services (SCS) portal at scs.sifive.com, wh...33.3 Oapi-CodegenCommand-line tool and Go library that converts OpenAPI 3.0 and 3.1 specifications into Go server-side, clie...32.8 ForgeCode API (Tailcall Inc)ForgeCode is the commercial CLI coding harness product from Tailcall Inc, positioned as an AI-enabled progr...31.9 StackShare GraphQL APIThe StackShare GraphQL API provides programmatic access to StackShare's database of developer tools and com...31.9 Playground GraphQL APIGraphQL gateway providing stateful mock query and mutation access to the same dataset, with an interactive ...31.5 Voiden Desktop ToolVoiden is a desktop application (Electron/TypeScript) for API design, testing, and documentation using .voi...31.2 Snap APIREST/HTTP screenshot and rendering API. GET /v1/take (alias /v1/render) captures screenshots and PDFs; /v1/...30.8 NJU e-Science Code Hosting (GitLab REST API v4)An institution-operated GitLab instance for NJU staff and students. Its REST API v4 is real and in producti...30.7 src CLIsrc is Sourcegraph's command-line client for code search, code intelligence, batch changes, and administrat...30.2 Zudoku Configuration APIZudoku is an open-source, developer-first API documentation framework built by Zuplo. It uses a file-based ...30.1 PlanetScale CLIThe PlanetScale CLI (pscale) is a command-line tool that brings PlanetScale database management to the term...29.8 Sapient SlingshotSapient Slingshot is Publicis Sapient's proprietary AI software-engineering platform — an enterprise LLM ga...29.4 RapidCanvas Platform APIBearer-token REST API behind the RapidCanvas platform and the RC CLI. All CLI interactions are HTTPS calls ...29.2 Wormhole CLICommand-line interface for interacting with Wormhole protocol operations including token transfers, NTT dep...28.9 Open Explorer MCP ServerHorizon Robotics' hosted Model Context Protocol server for the OpenExplorer toolchain. Probed anonymously o...28.8 Visual Studio Extensibility APIThe Visual Studio Extensibility API enables developers to create extensions that customize and extend Visua...28.7 Push Chain Testnet FaucetPublic testnet faucet at faucet.push.org for the Push Chain Donut Testnet. Delivers 1 PC (native gas token)...28.4 Taxi PlaygroundInteractive web-based editor for writing Taxi schemas and TaxiQL queries with live diagram generation and q...27.9 Advanced Schedule Cron APICompute upcoming fire times for a 5-field cron expression. Return next_runs, count, timezone, and the refer...27.2 ApyHub Developer Tools APIThe Developer Tools API from ApyHub — 120 operation(s) for developer tools.27.2 Audit Website SEO APISE Ranking Data API | Website Audit - provides a comprehensive suite of tools to programmatically manage th...27.2 Best Match Text Search APIRanks candidate strings against a source string and returns matches with Levenshtein distance. Useful for t...27.2 Broken Link Checker APIScan a webpage URL and get link statuses, redirect chains, response times, and a summary of broken links fo...27.2 Check Spelling APIDetect misspelled words in text and get correction suggestions. Returns the original input, misspelled word...27.2 Check WCAG Color Contrast APICompare foreground and background colors and get WCAG 2.1 contrast ratio, AA/AAA pass-fail, luminance, and ...27.2 Compare Features & Costs across Cloud ProvidersCloud Server Catalog gives you a searchable inventory of cloud locations and server offerings across provid...27.2 Convert Case & Slug from Text APIConvert text into slug, camelCase, snake_case, and other common cases. Useful for URLs, identifiers, headin...27.2 Convert Color Formats APIConvert a color string in hex, RGB, or HSL and get structured JSON back for palette, accessibility, and for...27.2 Convert Date & Time Formats APIConvert ISO strings, unix epochs, or now into UTC, localized, and relative formats. Returns weekday, week n...27.2 Convert HEX to RGB/HSL APIConvert a HEX color into RGB and HSL values. Useful for design tools, theming, and frontend workflows that ...27.2 Convert Number Bases APIConvert integer strings between bases 2 to 36, with auto-detection for 0x, 0o, and 0b prefixes. Useful for ...27.2 Convert Raw CSV to JSON APIConvert a CSV string into a JSON array of objects keyed by the header row. Get parsed rows in data and a to...27.2 Convert Raw JSON to CSV APIConvert a JSON array of objects into a CSV string with auto-generated headers. Useful for exports, reports,...27.2 Convert Raw JSON to XML APIConvert a JSON object in data to a well-formed XML string, with an optional root tag. Useful for legacy int...27.2 Convert Raw XML to JSON APIConvert XML strings into JSON while preserving attributes and text. Useful for parsing feeds, legacy integr...27.2 Convert Units APIConvert a numeric value from one unit to another using value, from_unit, and to_unit. Returns the original ...27.2 Correct Text Spelling APIDetect misspellings in short text and return corrected output plus word-level replacements. Useful for edit...27.2 CSV & JSON Data Cleaning and DeduplicationAnalyze CSV text or records for cleanup and duplicate checks. Configure key, required, and numeric columns ...27.2 Describe Cron APIBreak a cron expression into labelled minute, hour, day, month, and weekday fields. Useful for schedule pre...27.2 Detect File type APIInspect a binary file's magic bytes to return filename, extension, MIME type, and description. Useful for v...27.2 Differentiate Text APICompare two text or code snippets and get ordered diff segments plus addition, deletion, and unchanged coun...27.2 DNS Batch Lookup APIBatch resolve domains or IPs for A, AAAA, MX, NS, TXT, CNAME, and PTR records. Get per-row status plus reco...27.2 DNS Lookup APIResolve A, AAAA, MX, TXT, NS, CNAME, SOA, PTR, and CAA records for a domain. Returns records, ttl, and any ...27.2 Domain Availability APICheck whether a domain is available, taken, or indeterminate. Validate candidate names for signup flows, re...27.2 Domain WHOIS Lookup APIGet a domain’s WHOIS record from a domain query. Returns registrar, expiry date, creation date, status, ema...27.2 Email Syntax Validator APIValidate an email address by syntax only and get the local part, domain, and valid flag back. Useful for fa...27.2 Encode and Decode Base64 APIEncode UTF-8 text to Base64 or decode Base64 back to text. Useful for transport, inspection, and round-trip...27.2 Encode and Decode JWT APIEncode JSON payloads into JWTs and verify tokens with a shared secret. Returns a signed token, or validity ...27.2 Extract Readable Content from HTML APIExtract main article text and title from HTML using readability algorithms. Returns cleaned content, short ...27.2 Extract Sitemap from URL APIExtract URLs from a website’s sitemaps, with optional sitemap metadata and async job polling. Useful for SE...27.2 Extract Text from HTML APIExtract clean text from raw HTML, with optional URL support for better results. Returns text and length for...27.2 Extract Text from PDF Document APIExtract text from a PDF file and receive document text, page count, and per-page text. Useful for search, r...27.2 Format Date APIFormat an ISO datetime string with a Python strftime pattern. Returns the input, format, and formatted resu...27.2 Generate Hash APIHash a text string with MD5, SHA1, SHA256, or SHA512. Get the original input, chosen algorithm, and compute...27.2 Generate IDs In Batch APIGenerate batches of UUIDs, ULIDs, NanoIDs, hex strings, or short tokens. Useful for test data, fixtures, an...27.2 Generate Password APIGenerate cryptographically secure passwords with configurable length and optional symbols. Returns the pass...27.2 Generate Random Number APIGenerate a cryptographically secure integer between min and max. The response returns the chosen value and ...27.2 Generate Random String APIGenerate random strings up to 256 characters with alpha, alphanumeric, numeric, or hex output. Useful for t...27.2 Generate SVG Badge APIGenerate SVG badges from a label and message, with optional colors. Download the SVG or get a signed URL fo...27.2 Generate UUID APIGenerate version 1 or 4 UUIDs with a single GET request. Returns the UUID string and version for database k...27.2 JWT Decoder APIDecode a JWT from a token string and inspect its header, payload, and claims without verification. Useful f...27.2 Language Dictionary APIGet ISO 639-1 languages with code, English name, and native name. Useful for language pickers, localisation...27.2 MIME Type Lookup from File Name APIMap filenames or extensions to MIME types, or reverse a MIME type back to a filename-style value. Useful fo...27.2 Parse & Normalize US Address APIParse a free-form address line and optionally a country code into a structured response. Useful for checkou...27.2 Phone Number Formatter APIParse a phone number into E.164, international, and national formats. Returns validity plus country and reg...27.2 Phonetic Text Search APICompare a source word against candidate strings using Metaphone or Soundex. Returns matching words with sha...27.2 Ranked Text Search APIRank fuzzy matches for a search term against space-separated text. Returns matches with Levenshtein distanc...27.2 Resolve Short URL APIResolve shortened URLs to their destination. Control redirect hops and timeout for link checks, moderation,...27.2 Resume Parsing & Analysis APIParse resume files or text into structured output for ATS, screening, and candidate data workflows.27.2 Schedule Cron APICompute the next fire times for a 5-field cron expression. Returns the original expression and an array of ...27.2 Split Excel APISplit .xlsx and .xlsm files into one workbook per value group. Track job status, progress, and download fin...27.2 Text Distance Search APICompare two strings with Levenshtein distance. Send source and target, get an integer edit distance for fuz...27.2 Text Similarity Search APICompare a source string and a target string and get a 0 to 1 similarity score. Useful for fuzzy matching, d...27.2 Validate Or Generate Barcode Check Digits APIValidate or generate barcode check digits for EAN, UPC, and ISBN values. Returns validity and check-digit f...27.2 ReDocReDoc is an open-source API documentation renderer for OpenAPI specifications, originally created by Rebill...26.8

Emerging 22 Early or largely undocumented

QName AI WHOIS REST APIApproval-gated REST API for WHOIS/RDAP lookups: GET /api/whois/{domain} (single), POST /api/whois/batch (ba...26.0 Auggie CLIAuggie is Augment's command-line interface that brings the Augment agent, Context Engine, and tool integrat...25.6 WhistleWhistle is a cross-platform HTTP, HTTPS, HTTP/2, WebSocket, and TCP debugging proxy tool. It lets developer...24.9 CodePen POST to Prefill APIHTTP POST endpoint that accepts JSON-encoded code and configuration and opens a new (unsaved) Pen in the Co...24.4 Genql GraphQL APIFully-typed TypeScript client generated from any GraphQL schema, enabling type-safe query building with IDE...24.3 VacuumVacuum is the world's fastest OpenAPI linter written in Go. It processes API specifications at lightning sp...22.5 FastMCP CLIThe FastMCP CLI is a developer command-line tool for running, inspecting, installing, and debugging MCP ser...18.2 AVAP BRUNIXAVAP BRUNIX is an AI copilot integrated into the AVAP framework, providing intelligent assistance for API d...16.6 DapperDoxDapperDox is an open-source API documentation generator that renders beautiful, customizable reference docs...16.2 SpecLynxStop wrestling with OpenAPI specs. SpecLynx OpenAPI Toolkit delivers the most effective way to author and m...15.2 SpecLynx ApiDOMA unified semantic parsing engine that underpins all SpecLynx products. ApiDOM parses OpenAPI, AsyncAPI, Ar...15.2 SpecLynx CLIA command-line interface for overlay operations, dereferencing, bundling, format conversion (JSON/YAML), an...15.2 SpecLynx EditorA browser-based OpenAPI editor with real-time validation, smart autocompletion, and live preview. No instal...15.2 SpecLynx Language ServiceAn LSP-compatible npm library (@speclynx/apidom-ls) providing 13 intelligent editing capabilities for API d...15.2 SpecLynx OpenAPI ToolkitA VS Code extension providing semantic editing, real-time validation, linting, and live preview for OpenAPI...15.2 Babylon.js InspectorEmbeddable developer tool that overlays a live tree of every Babylon scene object — nodes, materials, textu...15.1 Spector.jsBrowser extension and embeddable library that captures and inspects WebGL / WebGPU frames — every draw call...15.1 API Stack DirectoryThe API Stack Directory is a searchable catalog of 213+ API tools and services organized into 50+ categorie...14.1 LinkPeek Screenshot APIGET-based HTTP image API that returns a screenshot for any given web page URI. Embeddable directly in HTML ...13.4 LinkPeek Website Screenshot APIREST-style HTTP GET endpoint that accepts a target web page URI and returns a screenshot image. Supports si...13.4 Website Screenshot APIREST-style HTTP GET image API. A call to /api/v1 with query parameters (uri, size, viewport) returns a scre...13.4 SpearSpear is a developer platform focused on API development workflows, providing tools for API design, collabo...12.9

Minimal 5 Almost no public developer surface

KeyRunner PlatformThe KeyRunner platform provides a local-first toolset for testing, monitoring, mocking, and running APIs wi...10.8 JoggrJoggr is a documentation platform purpose-built for software teams, helping engineering teams create and ma...9.9 Mask APIMask API is a powerful and flexible tool designed to help programmers and companies customize the response ...9.8 Developer ToolsLow-code configuration and extension surface for the Odessa Platform — documented APIs for connecting any a...8.0 QName AI WHOIS REST APIApproval-gated REST API for WHOIS/RDAP lookups: GET /api/whois/{domain} (single), POST /api/whois/batch (ba...7.3

Companies reaching this through an API (38)

These companies publish an API, specification or operation carrying “Developer Tools” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Score breakdown

Frequency

84.0

log-scaled weighted occurrences

Breadth

25.7

spread across providers

Quality lift

42.3

mean composite of providers using it

Cohesion

11.7

strength of nearest seed neighbor

Where this tag sits

988 providers carry this tag directly, and 1410 counting the 21 narrower tags below and the 1 beneath them — 422 more to reach.

Where this tag comes from

Provider tag988

Api tag196

Cohort brief

Auto-generated

The 956 providers in the APIs.io catalog tagged Developer Tools, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

956

all scored

Mean Kin Score

35.7

+12.8 vs catalog 22.9

Mean Agent Readiness

+8.1 vs catalog 11.9

Spread

0–84.3

median 35.7 · σ 17.6

How the 956 split by band

Exemplar 44Strong 93Developing 277Thin 252Emerging 204Minimal 86

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	46.7	23.2	+23.5	956
Operational Transparency	26.2	13.7	+12.5	956
Access Clarity	36.6	26.5	+10.1	956
Contract Quality	27.5	17.6	+9.9	956
Discoverability	64.2	58.1	+6.1	956
Contract Governance	10.3	6.3	+4	956

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	34%	14%	+20
MCP server (first-party)	33%	12%	+21
Agent Skills	0%	0%	0
OAuth scopes	13%	11%	+2
Security	99%	98%	+1
Arazzo workflows	4%	2%	+2
Governance rules	20%	14%	+6

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

1 AhaSend 84.3
2 GitHub Actions 82.8
3 GitLab 80.8
4 LaunchDarkly 80.8
5 GitHub 80.3
6 Sentry 80
7 Flagsmith 78.5
8 Bugsnag 78.4
9 Ironfang 78.2
10 Statsig 76.7

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This tag

curl "https://apis.io/api/v1/tags/developer-tools"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/developer-tools"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/developer-tools/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

Discovery needs no key. Ratings and market analysis are Pro.

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A second provider on the same verified email joins the account you already have.