Abstract Api

REST API per product (consistent design). Email validation: GET https://emailvalidation.abstractapi.com/v1/?api_key={key}&email={email}. Phone validation: GET https://phonevalidation.abstractapi.com/v1/?api_key={key}&phone={number}. IP geolocation: GET https://ipgeolocation.abstractapi.com/v1/?api_key={key}&ip_address={ip}. Each API has its own endpoint subdomain but consistent query parameter auth pattern. Response payloads are JSON with flat key-value structure. No pagination (single-item lookups). Bulk validation not natively supported — sequential requests required.

Standard HTTP status codes with JSON responses. 401 for invalid API key, 422 for invalid input (malformed email/phone), 429 for rate limit (monthly quota or per-second). Email validation response includes quality_score (0–1) for aggregate confidence. SMTP validation may timeout for slow mail servers — returns is_smtp_valid: false in those cases. Abstract API uptime at status.abstractapi.com. Simple single-request design makes error handling straightforward: 200 means valid response (check is_valid fields), 4xx means request error.

Abstract API bundles multiple utility APIs under a single account — email validation, phone number validation, IP geolocation, VAT/IBAN validation, timezone lookup, holidays API, and more. For agents, the value is both the email validation capability (syntax + MX + SMTP + disposable detection) and the convenience of multiple utility APIs under one key. Email validation endpoint returns: is_valid_format, is_free_email, is_disposable_email, is_role_email, is_catchall_email, is_mx_found, is_smtp_valid, quality_score. Clean, consistent REST design across all APIs. Free tier: 100 requests/month per individual API. Confidence is docs-derived.

API key as query parameter: ?api_key={key}. Single API key covers all Abstract APIs in the account. Keys from abstractapi.com account settings. HTTPS enforced. Rate limits: per-API monthly quotas (free: 100/month; paid plans for higher volume). No OAuth2. Key rotation via account settings. One key for all APIs is convenient but means a single compromised key exposes all Abstract API access.

docs.abstractapi.com provides API references for all Abstract APIs with examples in multiple languages (curl, Python, JavaScript, PHP, Ruby). Getting started: sign up, one API key, first call in under 2 minutes. Free tier is meaningful for testing and low-volume use. Official SDKs: Python (abstract-python) and Node.js (abstract-node) available. No community library ecosystem beyond official SDKs. Support via Abstract API email/chat. Simple, predictable API design is its primary strength.