# Waterfall for DevTools > Data APIs for DevTool acquisition, signup enrichment, account qualification, expansion, and customer tracking. - [Waterfall for DevTools](https://devtools.waterfall.io/v1/introduction.md): Enrichment and company data APIs for teams growing a developer product. - [Why Waterfall](https://devtools.waterfall.io/v1/why-waterfall.md): Reliable data, costs that work at scale, and APIs that fit your workflow. - [Enrich your first signup](https://devtools.waterfall.io/v1/quickstart.md): Send an email, retrieve the profile, and pass the company domain into account enrichment. - [What do you want to build?](https://devtools.waterfall.io/v1/use-cases.md): Practical guides for signup enrichment, account qualification, customer tracking, and brand monitoring. - [Qualify a new signup](https://devtools.waterfall.io/v1/qualify-signups.md): Combine person and account data with your own product signals. - [Pass qualified accounts to sales](https://devtools.waterfall.io/v1/route-accounts.md): Combine account fit and product activity before sending an account to your team. - [Find the buying team](https://devtools.waterfall.io/v1/find-buying-team.md): Use a company domain and your persona criteria to find relevant contacts. - [Follow a customer to a new company](https://devtools.waterfall.io/v1/follow-customers.md): Turn a job-change check into a reviewed account update. - [Evaluate campaign traffic](https://devtools.waterfall.io/v1/evaluate-traffic.md): Compare the companies you can identify across paid and organic acquisition channels. - [Get alerts for brand mentions](https://devtools.waterfall.io/v1/monitor-brand-mentions.md): See who's talking about your brand on social channels and send new mentions to your team. - [Enrich signups](https://devtools.waterfall.io/v1/enrich-signups.md): Turn a personal or work email into a professional profile and company identity. - [Get signup results](https://devtools.waterfall.io/v1/signup-results.md): Retrieve the enrichment job and attach the matched profile to your signup. - [Enrich accounts](https://devtools.waterfall.io/v1/enrich-accounts.md): Add company context to your signup, usage, and account-scoring workflows. - [Get account results](https://devtools.waterfall.io/v1/account-results.md): Retrieve company attributes for your account qualification workflow. - [Find relevant people](https://devtools.waterfall.io/v1/find-people.md): Find technical buyers and decision-makers at an account using your own persona criteria. - [Discover account roles](https://devtools.waterfall.io/v1/discover-roles.md): See the active job titles Waterfall has for an account before choosing your target roles. - [Identify visiting companies](https://devtools.waterfall.io/v1/identify-visitors.md): Find companies behind visits to your API docs, quickstart, or product pages. - [Track users across companies](https://devtools.waterfall.io/v1/track-users.md): Check whether an existing user or customer has left their previous company. - [Company monitoring](https://devtools.waterfall.io/v1/monitoring.md): Experimental APIs for brand mentions and hiring signals. - [Track brand mentions](https://devtools.waterfall.io/v1/company-mentions.md): Experimental: receive brand mentions with their source and available author context. - [Track account job openings](https://devtools.waterfall.io/v1/company-job-openings.md): Experimental: follow relevant hiring at companies you already care about. - [Find companies hiring for a technology](https://devtools.waterfall.io/v1/technology-hiring.md): Experimental: discover companies through technology keywords in job postings. - [Authentication](https://devtools.waterfall.io/v1/authentication.md): Use your existing Waterfall key from your backend or data workflow. - [Security and data handling](https://devtools.waterfall.io/v1/security-and-privacy.md): How we protect your data, process enrichment requests, and support your security review. - [Results: polling or webhooks](https://devtools.waterfall.io/v1/results.md): Handle asynchronous enrichment and immediate search results correctly. - [Webhook Verification](https://devtools.waterfall.io/v1/webhook-verification.md): Verify Waterfall webhook deliveries using Ed25519 signatures. - [Rate limit](https://devtools.waterfall.io/v1/rate-limit.md): Rate limit behavior and response headers. - [Errors](https://devtools.waterfall.io/v1/errors.md): Common HTTP status codes and troubleshooting guidance. - [Usage and signup economics](https://devtools.waterfall.io/v1/usage.md): Measure coverage, quality, and cost on your own signup data. - [Build with your agent](https://devtools.waterfall.io/v1/agent-workflows.md): Give your coding agent the API specification and the workflow you want to build. - [API reference and coverage](https://devtools.waterfall.io/v1/api-reference.md): The existing Waterfall API, organized around DevTool workflows. ## OpenAPI Specs - [api_specs](/api_specs.yaml)