Postgrid verify MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Postgrid verify MCP or direct API to autocomplete addresses, validate single or batch addresses, standardize formats, and prevent delivery errors through natural language.

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Api Key

Postgrid verify is an API that autocompletes, verifies, and standardizes postal addresses in real time. It helps reduce failed deliveries and ensures address quality for your business.

12 Tools

Try Postgrid verify now

Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
Postgrid verify
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TOOLS

Supported Tools

Every Postgrid verify action and event your agent gets out of the box.

Autocomplete Address

Tool to autocomplete a partially specified US or Canada address.

Autocomplete International Address

Tool to retrieve complete verified international address data using an ID from the preview endpoint.

Get Autocomplete Previews

Tool to get previews of autocompleted US and Canadian addresses.

Get International Autocomplete Previews

Tool to get previews of autocompleted international addresses.

Get Lookup Info

Tool to retrieve lookup usage information for your PostGrid account.

Lookup City and State from Postal Code

Tool to lookup city and state for a given postal or ZIP code.

Parse Address

Tool to break an address apart into its components.

Suggest Addresses

Tool to find addresses similar to the given address.

Verify Address

Tool to verify and standardize a US or Canadian address.

Batch Verify Addresses with Mixed Format

Tool to verify up to 2000 US and Canada addresses in a single API call.

Verify International Address

Tool to verify and standardize international addresses from 245+ countries.

Batch Verify International Addresses

Tool to verify up to 2000 international addresses in a single API call.

SETUP GUIDE

Connect Postgrid verify MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["postgrid_verify"],
  mcp: true,
});
Create a session scoped to Postgrid verify and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Verify the address 1600 Amphitheatre Parkway, Mountain View, CA 94043",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Postgrid verify request
SETUP GUIDE

Connect Postgrid verify API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["postgrid_verify"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Postgrid verify
3

Run Postgrid verify tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Verify the address 1600 Amphitheatre Parkway, Mountain View, CA 94043" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Postgrid verify tool calls through the session, and print the final answer

Why Use Composio?

AI Native Postgrid verify Integration

  • Supports both Postgrid verify MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Postgrid verify data

Managed Auth

  • Built-in API key handling with secure storage
  • Central place to manage, scope, and revoke Postgrid verify access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Postgrid verify
  • Scoped, least privilege access to Postgrid verify resources
  • Full audit trail of agent actions to support review and compliance

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

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FAQ

Frequently asked questions

Yes, Postgrid verify requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Postgrid verify connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Postgrid verify account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Postgrid verify actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Postgrid verify at any time.

When you connect a Postgrid verify account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Postgrid verify as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Postgrid verify. If Postgrid verify lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Postgrid verify at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Postgrid verify connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Postgrid verify rejects the old key. Create a new key in Postgrid verify and reconnect the account from the Composio dashboard or by asking your agent to reconnect Postgrid verify. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Postgrid verify use. Paid plans add higher limits and team features. Your Postgrid verify plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Postgrid verify accounts).

With Composio, you connect Postgrid verify once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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