How to integrate Census bureau MCP with Codex

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Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Census bureau MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Also integrate Census bureau with

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

How to install Census bureau MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

What is the Census bureau MCP server, and what's possible with it?

The Census bureau MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to Census Bureau data resources. It provides structured and secure access to a wide range of U.S. demographic, business, and community datasets, so your agent can retrieve population statistics, analyze survey results, fetch business patterns, and explore census variables on your behalf.

  • Retrieve up-to-date population estimates: Have your agent pull the latest demographic and population data for specific states, counties, or cities using the Population Estimates Program (PEP).
  • Analyze American Community Survey results: Access detailed ACS 1-year and 5-year estimates for any geography, helping you understand community trends, housing, and economic data.
  • Explore business statistics by region: Automatically fetch County Business Patterns (CBP) and Annual Business Survey (ABS) data to examine local industry and employment trends.
  • Access decennial census data: Let your agent retrieve variables and statistics from the decennial census by vintage and dataset for deep historical and demographic analysis.
  • Investigate variable metadata and definitions: Effortlessly obtain detailed information about any census variable, including descriptions, data types, and valid values for more informed analysis.

Supported Tools & Triggers

Tools
Geocode AddressTool to geocode a single address to get latitude/longitude coordinates.
Geocode Address for Census GeographiesGeocode an address and return Census geography identifiers including state, county, tract, block group, and block FIPS codes.
Geocode Address PartsTool to geocode an address using separate components (street, city, state, ZIP) to get latitude/longitude coordinates.
Geocode Address with GeographyTool to geocode an address and return both coordinates and Census geography information.
Geocode CoordinatesReverse geocode latitude/longitude coordinates to Census geographic areas.
Geocode Puerto Rico Address with GeographyTool to geocode a Puerto Rico address and return coordinates plus Census geography data.
Batch Geocode Addresses with GeographiesBatch geocode multiple addresses from a CSV file and return Census geography codes.
Geocode Puerto Rico AddressTool to geocode a Puerto Rico address with urbanization to latitude/longitude coordinates.
Get ACS 1-Year EstimatesTool to retrieve 1-year American Community Survey (ACS) estimates for a specified geography.
Get ACS 5-Year EstimatesRetrieve 5-year American Community Survey (ACS) estimates from the U.
Get Community Resilience EstimatesRetrieve U.
Get County Business PatternsTool to retrieve County Business Patterns (CBP) data for a specified year.
Get Dataset Examples HTMLTool to retrieve example queries for a Census dataset in HTML format.
Get Dataset Examples JSONTool to retrieve example API query patterns for a specific Census dataset and vintage.
Get Dataset Examples (XML)Tool to retrieve example queries for a Census Bureau dataset in XML format.
Get Dataset Geography HTMLTool to retrieve available geographies for a Census dataset in HTML format.
Get Dataset Geography JSONTool to get the list of supported geography levels for a specific Census dataset with their hierarchy and required predicates.
Get Dataset Geography XMLTool to retrieve available geographies for a Census Bureau dataset in XML format.
Get Dataset GroupsTool to retrieve the list of table groups for a Census dataset and vintage.
Get Dataset SortsTool to list available sort options for a specific Census dataset and vintage.
Get Dataset TagsTool to list available tags/keywords for a specific Census dataset and vintage.
Get Dataset Variables JSONTool to retrieve the complete list of available variables for a specific Census dataset.
Get Decennial Census DataRetrieve Decennial Census data (population, demographics, housing) from the U.
Get Planning Database DataGet Planning Database (PDB) data containing Census tract and block group level data useful for planning.
Get Population EstimatesRetrieves Population Estimates Program (PEP) data from the US Census Bureau API.
Get TIGERweb ACS Generalized BoundariesTool to access generalized ACS (American Community Survey) boundary services from TIGERweb for specific survey years (2012-2024).
Get TIGERweb Map Service MetadataTool to retrieve TIGERweb MapServer service metadata including available layers, capabilities, and spatial reference information.
Get Timeseries Examples HTMLTool to retrieve HTML-formatted example queries for a Census Bureau timeseries dataset.
Get Timeseries Examples JSONTool to get example queries for a timeseries dataset in JSON format.
Get Timeseries Examples XMLTool to retrieve example queries for a Census Bureau timeseries dataset in XML format.
Get Timeseries Geography HTMLTool to retrieve available FIPS geographies for a timeseries dataset in HTML format.
Get Timeseries Geography JSONTool to get available geographies for a timeseries dataset in JSON format.
Get Timeseries Geography XMLTool to retrieve available geographies for a Census Bureau timeseries dataset in XML format.
Get Timeseries Variables HTMLTool to retrieve a list of available variables for a Census timeseries dataset in HTML format.
Get Timeseries Variables JSONTool to get a list of variables available for a timeseries dataset in JSON format.
Get Timeseries Variables XMLTool to get a list of variables available for a timeseries dataset in XML format.
Get Variable DetailsTool to retrieve metadata for a specific variable in a Census dataset for a given year.
List Available DatasetsLists all available Census Bureau datasets with their metadata, vintages, and API endpoints.
List Datasets HTMLTool to retrieve a complete HTML listing of all available (non-timeseries) Census Bureau datasets.
List Datasets XMLTool to retrieve a list of all available Census Bureau datasets in XML format.
List Geocoder BenchmarksList all available benchmark versions for the Census Bureau geocoding service.
List Geocoder VintagesTool to list available geography vintages for a given Census geocoder benchmark.
List TIGERweb ServicesTool to discover all available TIGERweb map services for Census geographic boundaries.
List Timeseries Datasets (HTML)Tool to retrieve a list of all available timeseries datasets from the US Census Bureau API in HTML format.
List Timeseries Datasets (JSON)Tool to list all available timeseries datasets from the US Census Bureau API.
List Timeseries Datasets (XML)Tool to retrieve a list of all available Census Bureau timeseries datasets in XML format.
Query ACS Supplemental EstimatesQuery ACS Supplemental Estimates data by variables and geography.
Query ACS Comparison ProfilesQuery ACS Comparison Profiles data by variables and geography.
Query ACS Migration FlowsTool to query American Community Survey (ACS) Migration Flows data by variables and geography.
Query ACS Data ProfileTool to query ACS Data Profiles by variables and geography.
Query ACS Selected Population ProfilesTool to query ACS Selected Population Profiles (SPP) data by variables and geography for specific population groups.
Query ACS Subject TablesTool to query ACS Subject Tables data by variables and geography.
Query Annual Business SurveyTool to query Annual Business Survey Company Summary (abscs) data with demographic filters.
Query Commodity Flow SurveyQuery Commodity Flow Survey data on freight shipments by origin, destination, mode, and commodity.
Query CPS Survey DataTool to query Current Population Survey (CPS) microdata including basic monthly employment data and supplemental surveys.
Query Decennial DHCTool to query Decennial Census Demographic and Housing Characteristics (DHC) data by variables and geography.
Query Decennial Census Demographic ProfileTool to query Decennial Census Demographic Profile data by variables and geography.
Query Decennial Census P.L. Redistricting DataTool to query Decennial Census P.
Query Economic Census DataTool to query Economic Census data including establishments, employment, payroll, and receipts by geography and industry (NAICS).
Query International Trade TimeseriesTool to query International Trade timeseries data from Census Bureau API.
Query Nonemployer StatisticsTool to query Nonemployer Statistics data covering businesses with no paid employees.
Query PEP CharAgeGroupsQuery population estimates by age groups, sex, race, and Hispanic origin from the Census Bureau PEP CharAgeGroups dataset.
Query PEP ComponentsQuery components of population change from the Census Bureau Population Estimates Program (PEP).
Query PEP Housing EstimatesQuery housing unit estimates from the US Census Bureau Population Estimates Program (PEP).
Query Population ProjectionsQuery population projections from the Census Bureau API.
Query Surname DataQuery surname frequency data from the U.
Query TIGERweb LayerTool to query TIGERweb GeoServices for Census geographic boundaries and features.
Query Business Dynamics StatisticsQuery Business Dynamics Statistics (BDS) time series data from the Census Bureau.
Query Timeseries DataQuery Census timeseries datasets containing longitudinal data for multiple time periods.
Query Economic Indicators Time SeriesTool to query Economic Indicators Time Series (EITS) data from the US Census Bureau.
Query Residential Construction StatsTool to query Residential Construction statistics from Census Bureau Economic Indicators Time Series (EITS).
Query Residential Sales DataQuery Residential Sales statistics from Census Bureau's Economic Indicator Time Series (EITS).
Query Health Insurance EstimatesQuery Small Area Health Insurance Estimates (SAHIE) from the Census Bureau timeseries API.
Query Household Pulse Survey TimeseriesTool to query Household Pulse Survey (HPS) timeseries data measuring household experiences during the COVID-19 pandemic.
Query International DatabaseQuery International Database (IDB) demographic data for 227 countries and areas worldwide.
Query Timeseries International Trade Exports by HSTool to query international trade exports by Harmonized System code from Census Bureau time series API.
Query Timeseries International Trade Imports by End UseQuery international trade imports by end-use category from Census Bureau timeseries data.
Query Timeseries PovertyQuery poverty statistics from the Census Bureau's timeseries poverty datasets.
Query QWI Timeseries DataQuery Quarterly Workforce Indicators (QWI) timeseries data on employment, earnings, and job flows.
Query Timeseries QWI State/AreaQuery Quarterly Workforce Indicators (QWI) State/Area characteristics from the Census Bureau's time series API.
Query ZIP Business PatternsTool to query ZIP Code Business Patterns (ZBP) data including establishments and employment by ZIP code and industry.

Conclusion

You've successfully integrated Census bureau with Codex using Composio's MCP server. Now you can interact with Census bureau directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Census bureau operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1000+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Census bureau operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

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FAQ

What are the differences in Tool Router MCP and Census bureau MCP?

With a standalone Census bureau MCP server, the agents and LLMs can only access a fixed set of Census bureau tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Census bureau and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Codex?

Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Census bureau tools.

Can I manage the permissions and scopes for Census bureau while using Tool Router?

Yes, absolutely. You can configure which Census bureau scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Census bureau data and credentials are handled as safely as possible.

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