Smarty (US & International Address Verification)

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You want to try it free before paying

• █████░░░░░
  50 / 100
  Agent friendliness
• ████████▒░
  85 / 100
  Pricing transparency
• ██████░░░░
  60 / 100
  Setup speed
• ███▒░░░░░░
  35 / 100
  Docs quality
• ████████▒░
  85 / 100
  Procurement ease
• ███████▒░░
  75 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Subscription [2]smarty.com/pricing“Professional (Monthly): $50/month base; Lookup options: 1K, 5K, 10K, 25K, 50K, 85K, or 170K per month; Rate limit: Up to 25,000 address lookups/second”smarty.com/pricing/international-address-verification“Base Cost: $95/month; Lookup Tiers Available: 1K, 2.5K, 5K, 10K lookups/month”

Published pricing

✓ Yes [3]smarty.com/pricing“Professional Plan: $50/month with lookup options 1K, 5K, 10K, 25K, 50K, 85K, 170K per month”smarty.com/pricing/international-address-verification“1K lookups/month at $95/month”

Free tier

✗ No [4]smarty.com/free-address-verification“The trials are limited to the number of lookups or 42 days, whichever comes first.”smarty.com/pricing“Free Trial: $0/month for 42 days, 1,000 address lookups included, No credit card required”

Free tier details

42-day free trial with 1,000 US lookups and 100 international lookups; no credit card required; one-time trial only, not a recurring free tier

Self-serve signup

✓ Yes

Requires sales call

✗ No

Enterprise plan

✓ Yes [5]smarty.com/pricing“Custom Enterprise: Pricing negotiated based on needs. Custom lookup volume per second. Custom legal terms and enhanced data privacy/compliance options.”

• USPS CASS certified
• International coverage
• Address autocomplete
• Geocode append
• Bulk / batch
• Rooftop precision

Supported actions

verify_address, standardize, parse, geocode_append, reverse_geocode, autocomplete, dpv_check, bulk_verify, zip_code_lookup, postal_code_lookup, address_enrichment, extract_addresses_from_text, secondary_address_lookup, census_geodata_lookup, business_data_lookup, international_verify, international_autocomplete, international_postal_code_lookup [6]smarty.com/docs/“US Street Address API, US ZIP Code API, US Autocomplete V2 API, US Autocomplete Pro API, US Reverse Geocode API, US Address Enrichment API, US Extract API, International Street Address API, International Autocomplete API, International Postal Code API”

Regions

United States (USPS CASS certified: 5-digit coding, ZIP+4/delivery point coding, carrier route coding, DPV, DSF2, LACSLink, SuiteLink, eLOT, RDI), 249 countries and territories for international street address verification, 240+ countries and territories for international autocomplete [7]smarty.com/legal/certifications“CASS-Certified™ provider meeting stringent requirements that the USPS has outlined. Certified in: 5-digit coding, ZIP+4/delivery point coding, carrier route coding, DPV® or DSF2®, LACSLink®, SuiteLink®, eLOT®, RDI™”smarty.com/docs/apis/international-street-api/reference“The API supports 249 countries and territories globally, from Afghanistan to Zimbabwe, plus Åland Islands.”

Languages

English, Chinese (non-Latin), Arabic (non-Latin), Cyrillic (non-Latin), multi-language and Unicode support for non-Latin scripts

Input types

free-form address string, structured address components (street, city, state, zipcode), partial address for autocomplete, postal code, geo coordinates (for reverse geocoding), unstructured text for address extraction (US Extract API)

Output types

standardized address, deliverability/validity codes (DPV match codes), DPV footnotes, CMRA flags, vacancy status, geocode (latitude/longitude), ZIP+4, county FIPS/name, carrier route, RDI (residential/delivery indicator), SmartyKey unique identifier, component-level analysis, IANA timezone, record type metadata, JSON, address enrichment data (up to 350 property attributes)

Webhooks

✗ No [8]smarty.com/docs/“Documentation lists US Street Address API, ZIP Code API, Autocomplete APIs, Reverse Geocode API, Enrichment API, Extract API, International APIs — no webhooks or event callback endpoints are described anywhere in the documentation.”

Sandbox / test mode

✗ No [9]smarty.com/docs/account/testing“Before you pay for address validation from Smarty, you may be interested in testing our services. For this reason, we give everyone 1,000 free testing lookups.”

SDK languages

Python, JavaScript, Java, PHP, Ruby, .NET, Go, iOS, Rust [10]smarty.com/docs/sdk“open-source (Apache 2.0 License), well-tested, actively developed”github.com/smarty/smarty-rust-sdk“Rust SDK for Smarty APIs”

MCP server

✓ Yes [11]smarty.com/docs/mcp“Server URL: https://mcp.api.smarty.com/ — this is Smarty's official MCP server for address data services. The server exposes 20 tools spanning US address verification, international address verification, ZIP Code lookup, reverse geocoding, property enrichment, census geographic data, secondary address data, and business data.”

SOC 2

SOC 2 Type II [12]smarty.com/legal/certifications“SOC 2 system requirements developed by the American Institute of CPAs. Our security systems have been audited, our employees have been background checked.”gartner.com/reviews/market/data-and-analytics/vendor/smarty/product/us-address-verification“Smarty maintains a SOC 2 Type II certification covering the Security, Availability, and Confidentiality of their system.”

HIPAA

✓ Yes [13]smarty.com/docs/hipaa“For a fully HIPAA-compliant data solution, you can read more about our Enterprise data program. We are happy to enter into a service partnership to validate your addresses.”smarty.com/legal/certifications“HIPAA Compliant”

GDPR

✓ Yes [14]smarty.com/legal/privacy-policy“We have implemented measures to protect your personal information, including by using the European Commission's Standard Contractual Clauses for transfers of personal information between our group companies and between us and our third-party providers.”

ISO 27001

– Unknown

PCI DSS

– Unknown

Published SLA

✓ Yes [15]smarty.com/legal/service-level-agreement“US Street Address API: 99.98% target availability measured at 5-minute intervals; International Street Address API: 99.90% measured monthly”

Rate limits

US Street Address API (Professional): up to 25,000 lookups/second; International Street Address API: up to 3,500 lookups/second; Rate limiting uses Leaky Bucket algorithm; 429 status returned with Retry-After header when exceeded; HTTP POST batch: max 100 addresses or 32 KB per request (US Street API) [16]smarty.com/pricing“Up to 25,000 address lookups / second (Professional plan for US verification)”smarty.com/pricing/international-address-verification“Up to 3,500 address lookups / second (International verification professional plan)”

Known restrictions

No overage; plan depletion returns HTTP 402 error, Rooftop geocoding data requires an active subscription to retain/use, Enhanced Data Privacy (transient-memory-only processing) available only on Enterprise plan, HIPAA compliance and BAA available only through Enterprise plan, International testing limited to first 100 addresses during trial, SSO available only on specific enterprise-level plans, Services not warranted for emergency, life-critical, or safety-critical applications, Embedded keys restricted by IP whitelist (up to 100 hosts); secret keys required for POST requests, No hard-coded IPs; DNS resolution required, Only HTTPS/TLS 1.2+ supported; plaintext HTTP not supported [17]smarty.com/docs/hipaa“For a fully HIPAA-compliant data solution, you can read more about our Enterprise data program.”smarty.com/pricing“We don't have overage costs on depleted plans. Instead, users receive a 402 error, 'payment required' when exceeding limits.”

• Docs
• API reference
• Status page

Docs rendering: static

API style

rest

Base URL

https://us-street.api.smarty.com/street-address

Versioning

none

Stability

ga

Auth methods

api_key, basic

Error format

vendor-specific (HTTP status codes with JSON response)

SDKs

• Python smartystreets_python_sdk · repo
• JavaScript smartystreets-javascript-sdk · repo
• Java · repo
• PHP · repo
• Ruby · repo
• .NET · repo
• Go · repo
• iOS · repo
• Rust · repo

• Auth docs
• Quickstart
• Deprecation policy

Launched

2012-01-01

Notable customers

NASA, Uber, Chase Bank, Cox Communications, Guidewire, American Red Cross

• Lob Address Verification

  "Avoid mail missteps and make failed deliveries a thing of the past."

  Hybrid · free tier · public pricing · self-serve

• Loqate Address Verification

  "Global address verification that ensures you reach your customers, every time."

  Usage · public pricing · self-serve

• PostGrid Address Verification

  "Autocomplete, Verify, Validate, and Standardize addresses across 250+ countries & territories to local postal standards"

  Hybrid · public pricing · self-serve

• Melissa

  Global data quality and enhancement solutions to profile, verify, clean, update, match, and integrate People data.

  Hybrid · free tier · public pricing · self-serve

• Service Objects DOTS Address Validation

  "Maximize Address Accuracy and Deliverability"

  Sales-led · self-serve

• Precisely Verify (Address Verification)

  "Deliver accurate, consistent, contextual data to your business - wherever and whenever it's needed."

  Sales-led · self-serve

Smarty (US & International Address Verification) alternatives · Smarty (US & International Address Verification) vs Lob Address Verification · All Address Validation APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: smarty.com
2. ↑Pricing model: smarty.com · smarty.com
3. ↑Published pricing: smarty.com · smarty.com
4. ↑Free tier: smarty.com · smarty.com
5. ↑Enterprise plan: smarty.com
6. ↑Supported actions: smarty.com
7. ↑Regions: smarty.com · smarty.com
8. ↑Webhooks: smarty.com
9. ↑Sandbox: smarty.com
10. ↑SDK languages: smarty.com · github.com
11. ↑MCP server: smarty.com
12. ↑SOC 2: smarty.com · gartner.com
13. ↑HIPAA: smarty.com · smarty.com
14. ↑GDPR: smarty.com
15. ↑Published SLA: smarty.com
16. ↑Rate limits: smarty.com · smarty.com
17. ↑Known restrictions: smarty.com · smarty.com

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Agent Friendliness: 30 → 50
2. 2026-06-15 Score Docs Quality: 15 → 35
3. 2026-06-14 Has Structured Data: (none) → Yes
4. 2026-06-14 API Reference URL: (none) → https://www.smarty.com/docs/apis/download-api/reference
5. 2026-06-14 Robots Allows Agents: (none) → Yes
6. 2026-06-14 Capabilities: {} → {"bulk":true,"rooftop":true,"autocomplete":true,"international":true,"cass_cert…
7. 2026-06-14 Summary Md: (none) → Smarty is a REST API for US and international address verification, offering US…
8. 2026-06-14 Avoid If: (none) → You want to try it free before paying
9. 2026-06-14 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
10. 2026-06-14 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
11. 2026-06-14 Score Agent Friendliness: (none) → 30
12. 2026-06-14 Score Pricing Transparency: (none) → 85
13. 2026-06-14 Score Setup Speed: (none) → 60
14. 2026-06-14 Score Docs Quality: (none) → 15
15. 2026-06-14 Score Procurement Friction: (none) → 85
16. 2026-06-14 Score Trust Readiness: (none) → 75
17. 2026-06-14 Llms Txt Present: (none) → No
18. 2026-06-14 Docs URL: (none) → https://www.smarty.com/docs
19. 2026-06-14 Status Page URL: (none) → https://status.smarty.com
20. 2026-06-14 Rendering: (none) → static
21. 2026-06-14 Self Serve Signup: set to Yes
22. 2026-06-14 Requires Sales Call: set to No
23. 2026-06-14 Enterprise Plan Available: set to Yes
24. 2026-06-14 SOC 2: set to type_2
25. 2026-06-14 HIPAA: set to Yes
26. 2026-06-14 GDPR: set to Yes
27. 2026-06-14 SLA Published: set to Yes
28. 2026-06-14 SLA URL: set to https://www.smarty.com/legal/service-level-agreement
29. 2026-06-14 Data Retention Policy URL: set to https://www.smarty.com/legal/privacy-policy
30. 2026-06-14 Documented Rate Limits: set to US Street Address API (Professional): up to 25,000 lookups/second; Internationa…
31. 2026-06-14 Known Restrictions: set to No overage; plan depletion returns HTTP 402 error, Rooftop geocoding data requi…
32. 2026-06-14 Auth Methods: set to api_key, basic
33. 2026-06-14 Auth Docs URL: set to https://www.smarty.com/docs/cloud/authentication
34. 2026-06-14 API Style: set to rest
35. 2026-06-14 Base URL: set to https://us-street.api.smarty.com/street-address
36. 2026-06-14 Versioning Scheme: set to none
37. 2026-06-14 Stability: set to ga
38. 2026-06-14 Deprecation Policy URL: set to https://www.smarty.com/docs/apis/best-practices
39. 2026-06-14 Quickstart URL: set to https://www.smarty.com/docs/getting-started/us-address-verification
40. 2026-06-14 Error Format: set to vendor-specific (HTTP status codes with JSON response)
41. 2026-06-14 Requires Verification: set to No
42. 2026-06-14 Starting Price Usd: set to 50
43. 2026-06-14 Price Basis: set to month
44. 2026-06-14 Slug: set to smarty
45. 2026-06-14 Launched At: set to 2012-01-01
46. 2026-06-14 Notable Customers: set to NASA, Uber, Chase Bank, Cox Communications, Guidewire, American Red Cross
47. 2026-06-14 Fields Not Found: set to ISO 27001 certification, PCI DSS compliance, SOC 2 type explicitly stated (Type…
48. 2026-06-14 Source Confidence: set to high
49. 2026-06-14 Extractor: set to claude-subagent:sonnet
50. 2026-06-14 Last Verified At: set to 2026-06-14T00:00:00.000Z

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