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PostGrid Verify for AI agents

PostGrid Verify autocompletes, verifies, and standardizes addresses in real time for individual or batch lookups. Developers use it to reduce failed deliveries from bad address data. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect PostGrid VerifySee the 12 actions ↓
Developer toolsAPI keyMCP + RESTpostgrid.com
AUDIT LOG · POSTGRID VERIFYPOLICY: acme-support
09:41:07 · claude · u_8f2read
postgrid_verify.get_lookup_info
Get Lookup Info✓ allowed · 212ms
09:41:08 · claude · u_8f2read
postgrid_verify.parse_address
Parse Address✓ allowed · 164ms
09:41:09 · claude · u_8f2write
postgrid_verify.suggest_addresses
Suggest Addresses✓ approved · approved by user
EVERY POSTGRID VERIFY CALL, ON THE RECORD
01 · USE CASES

What agents do in PostGrid Verify.

01

Verify a customer's address

Check an entered address against postal records before confirming a shipment.

02

Autocomplete an address field

Suggest address completions as a customer types during checkout.

03

Batch verify a mailing list

Validate a full list of addresses in one pass before a mail campaign goes out.

02 · ACTIONS

12 PostGrid Verify actions, graded by risk.

Every PostGrid Verify action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

9

Look things up. Allowed by default.

  • postgrid_verify.get_lookup_info
    Get Lookup Info
  • postgrid_verify.get_autocomplete_previews
    Get Autocomplete Previews
  • postgrid_verify.get_intl_autocomplete_previews
    Get International Autocomplete Previews
  • postgrid_verify.parse_address
    Parse Address
  • postgrid_verify.verify_address
    Verify Address
  • postgrid_verify.verify_batch_addresses
    Batch Verify Addresses with Mixed Format
  • postgrid_verify.verify_intl_addresses_batch
    Batch Verify International Addresses
  • postgrid_verify.verify_international_address
    Verify International Address
  • postgrid_verify.lookup_city_state_from_postal
    Lookup City and State from Postal Code

write

3

Create and change things. Allow, or ask the user first.

  • postgrid_verify.suggest_addresses
    Suggest Addresses
  • postgrid_verify.autocomplete_address
    Autocomplete Address
  • postgrid_verify.autocomplete_intl_address
    Autocomplete International Address

destructive

0

Delete, cancel or archive. Ask first, or deny outright.

  • No destructive actions.
03 · HOW IT WORKS

PostGrid Verify in three steps.

  1. 01Your users connect PostGrid VerifyThey add their PostGrid Verify api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, and writes like “suggest Addresses” can wait for the user to approve.
  3. 03Any agent can actYour agent calls PostGrid Verify through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('postgrid_verify', {
  read: 'allow',
  write: 'ask',        // suggest_addresses
  destructive: 'deny',  
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How PostGrid Verify connects.

Users add their PostGrid Verify api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same PostGrid Verify connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use PostGrid Verify from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More developer tools apps.

GitHub896 actionsSupabase129 actions0CodeKit8 actionsAbly25 actionsAbstract3 actionsAddressfinder17 actionsAddresszen2 actionsAlchemy36 actions
ALL DEVELOPER TOOLS APPS →
07 · FAQ

PostGrid Verify and Arc0, answered.

Q01

Can I use PostGrid Verify with Claude, ChatGPT or Cursor?

Yes. Connect PostGrid Verify to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the PostGrid Verify actions you allow.

Q02

How do users connect PostGrid Verify?

Users add their PostGrid Verify api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which PostGrid Verify actions can my agent take?

12 in total: 9 read, 3 write and 0 destructive, such as “suggest Addresses”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in PostGrid Verify?

Yes. Allow read actions and deny writes in the PostGrid Verify policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call PostGrid Verify too?

Yes. The same PostGrid Verify connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug PostGrid Verify into your agent.

Your users connect PostGrid Verify once, under your brand. Your agent gets 12 actions behind your policies, with every call on the record.

Connect PostGrid VerifyBrowse all apps →

Free to build · MCP + REST · Audit log on every plan