Addrex Address Validation API

Addrex Address Validation API validates, standardizes, and classifies U.S. addresses for spreadsheet and application workflows. Results can include standardized fields, match codes, confidence scores, and coordinates. For batch cleanup, users can upload CSV or Excel files; the service detects address columns, processes them, and returns a downloadable file with output fields appended. Cleanup can expand abbreviations, correct typos, parse grid-style inputs, and append ZIP+4 when a match is available. API requests accept either a one-line address or structured fields and return JSON with validation status, confidence, standardized fields, and changes. Free Beta is listed as free and includes 10,000 address lookups per month; email verification is required, and autocomplete is excluded. Paid plans start at $39/mo. Autocomplete is available only on paid plans. Real-time API data is not kept beyond the request, while batch files default to seven days of retention and can be deleted earlier. Addrex does not claim USPS DPV or CASS certification.

Addrex supports both batch spreadsheet cleanup and API-based address validation. Check the plan's lookup allowance and autocomplete access, and note that Addrex does not claim USPS DPV or CASS certification.

It suits teams cleaning address data in spreadsheets or connecting address validation to applications. Listed use cases include shipping, onboarding, insurance underwriting, territory mapping, and analytics.

Addrex is a U.S.-address validation service for teams cleaning spreadsheets or checking addresses in an app. Its batch tools and developer API cover both jobs, but it is not the choice for international data or workflows that require USPS DPV or CASS certification.

Overview

Addrex validates, standardizes, and classifies U.S. addresses, returning match codes, confidence scores, and coordinates. It brings batch file cleanup and API-based checks together, which suits teams handling both existing records and new address submissions. Its U.S.-only coverage is a firm limit for businesses processing addresses across countries.

Key features

Upload a CSV or Excel file and Addrex detects address columns, processes the records, and returns cleaned data with output fields appended. It expands abbreviations, corrects typos, parses grid-style inputs, and can append ZIP+4 when a match is available. That makes the spreadsheet workflow useful for operations teams who need to clean a file without building their own import process.

The API accepts either a one-line address or structured fields and returns JSON with validation status, confidence, standardized fields, and changes. Curl, Node.js, and Python examples give developers practical request patterns to start from, though Addrex does not name specific third-party product integrations. Autocomplete suggestions and details are restricted to paid plans, so the free beta cannot serve as a no-cost autocomplete option.

Security controls include TLS 1.2+ in transit, AES-256 encryption for stored data, revocable hashed API keys, and default exclusion of PII from application logs. Real-time API address data is not retained beyond the request; batch files default to seven days and can be deleted sooner. Addrex does not claim USPS DPV or CASS certification. Its infrastructure providers maintain SOC 2 Type II compliance, while Addrex says it is working toward its own certification. Email technical support is offered, and contact forms receive a response within one business day.

Pricing

The Free Beta costs nothing and includes 10,000 address lookups/month, spreadsheet upload, map coordinates, a usage dashboard, and CSV export, with no automatic overage billing. Email verification is required, and autocomplete is excluded. The beta's listed monthly lookup allowance differs from its separate limit of 10,000 validation rows per day; users with substantial daily volume should account for both caps.

Pay As You Go is priced on request, billed Usage based, with no fixed monthly lookup bundle. It includes spreadsheet upload, a usage dashboard, and exports, with usage-based billing requiring approval. It can suit variable workloads that do not justify a recurring bundle, but the per-contact rate makes costs dependent on volume.

Starter costs $39 a month, billed $39/month, for 5,000 address lookups/month and 2,500 autocomplete lookups/month. Growth costs $79 a month, billed $79/month, for 20,000 address lookups/month and 10,000 autocomplete lookups/month. Pro costs $149 a month, billed $149/month, for 50,000 address lookups/month and 25,000 autocomplete lookups/month. Scale costs $299 a month, billed $299/month, for 150,000 address lookups/month and 75,000 autocomplete lookups/month.

All four monthly plans include spreadsheet upload, map coordinates, and CSV export, and each charges $0.30 per 1,000 overage lookups. Starter is the entry point for recurring use and paid autocomplete; Growth, Pro, and Scale increase both lookup allowances for larger workloads. Choose a tier against expected monthly use: the larger allowances do not remove the stated overage charge. Enterprise customers can arrange custom volumes, SLAs, private networking, and dedicated support.

Platforms

Addrex supports API and web access. Batch validation, address correction, standardization, and autocomplete are supported, but autocomplete is paid-plan only. Its coverage is local to U.S. addresses.

Who it's for

Addrex fits teams that need to clean address spreadsheets or connect validation to an application. Its cited use cases include shipping, onboarding, insurance underwriting, territory mapping, and analytics. It is less suitable for international address programs or organizations whose workflows require USPS DPV or CASS certification.

Pros and cons

• Pro: Spreadsheet upload and API validation serve batch cleanup and app-connected workflows in one service.
• Pro: The Free Beta offers a substantial stated daily validation allowance and has no automatic overage billing.
• Pro: Data handling includes encryption, revocable hashed API keys, and short retention for real-time API requests.
• Con: Autocomplete is unavailable on the Free Beta, limiting its use for free point-of-entry suggestions.
• Con: Address coverage is U.S.-only, and Addrex does not claim USPS DPV or CASS certification.
• Con: Monthly lookup quotas and overage charges mean paid-plan costs depend on actual volume.

Alternatives

Address Verification Software is the broader category page for comparing address verification options.

Choose Addresser if Android or iOS access matters; its free eCommerce plan includes 1,000 lookups per 30 days and autocomplete. Smarty Address Verification is an alternative with a 42-day free trial covering 1,000 address lookups and no credit card requirement, plus broader platform availability. Melissa Global Address Verification offers a free tier of 250 records/month and a paid starting tier of 1,000 records/month for $40 a month.

PostalUp may suit a small test workload: its free tier provides 1,000 requests that never expire, with a 10 requests/minute limit and basic validation. AddressZen offers a free year with 1,400 verified addresses, while its address bundle is a one-time $1,000 for 55,000 verified addresses. Lob Address Verification is another API-and-web option, with a Developer plan for one user and up to 6,000 mailings, plus additional-address charges.

PostNL Address Validation API is an alternative for Benelux address checks when the customer has a PostNL parcel contract. Byteplant Address Validator is another API-and-web option with a monthly subscription and credits that roll over.

Verdict

Addrex is a sound fit for U.S.-focused teams that need both spreadsheet cleanup and API validation, with a free beta to start and paid tiers that add autocomplete and higher monthly allowances. Its clearest reasons to look elsewhere are international coverage and any requirement for USPS DPV or CASS certification.