Transportation Laws and Incentives

nrel · Data

Data No Auth Free & Open open_data

Query our database of federal and state laws and incentives for alternative fuels and vehicles, air quality, fuel efficiency, and other transportation-related topics. This dataset powers the Federal and State Laws and Incentives on the Alternative Fuels Data Center.

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET Return a full list of laws and incentives that match your query.

Return a full list of laws and incentives that match your query.

https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}?poc=false&limit=10&local=false&recent=false&api_key=DEMO_KEY&expired=false&keyword=test&law_type=example&user_type=example&technology=example&jurisdiction=example&incentive_type=example&regulation_type=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}?poc=false&limit=10&local=false&recent=false&api_key=DEMO_KEY&expired=false&keyword=test&law_type=example&user_type=example&technology=example&jurisdiction=example&incentive_type=example&regulation_type=example"

import requests
params = {
    "poc": "false",
    "limit": "10",
    "local": "false",
    "recent": "false",
    "api_key": "DEMO_KEY",
    "expired": "false",
    "keyword": "test",
    "law_type": "example",
    "user_type": "example",
    "technology": "example",
    "jurisdiction": "example",
    "incentive_type": "example",
    "regulation_type": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}');
url.searchParams.set('poc', 'false');
url.searchParams.set('limit', '10');
url.searchParams.set('local', 'false');
url.searchParams.set('recent', 'false');
url.searchParams.set('api_key', 'DEMO_KEY');
url.searchParams.set('expired', 'false');
url.searchParams.set('keyword', 'test');
url.searchParams.set('law_type', 'example');
url.searchParams.set('user_type', 'example');
url.searchParams.set('technology', 'example');
url.searchParams.set('jurisdiction', 'example');
url.searchParams.set('incentive_type', 'example');
url.searchParams.set('regulation_type', 'example');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}")
	q := baseURL.Query()
	q.Set("poc", "false")
	q.Set("limit", "10")
	q.Set("local", "false")
	q.Set("recent", "false")
	q.Set("api_key", "DEMO_KEY")
	q.Set("expired", "false")
	q.Set("keyword", "test")
	q.Set("law_type", "example")
	q.Set("user_type", "example")
	q.Set("technology", "example")
	q.Set("jurisdiction", "example")
	q.Set("incentive_type", "example")
	q.Set("regulation_type", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}")
uri.query = URI.encode_www_form({
  "poc" => "false",
  "limit" => "10",
  "local" => "false",
  "recent" => "false",
  "api_key" => "DEMO_KEY",
  "expired" => "false",
  "keyword" => "test",
  "law_type" => "example",
  "user_type" => "example",
  "technology" => "example",
  "jurisdiction" => "example",
  "incentive_type" => "example",
  "regulation_type" => "example"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1.{output_format}?" . http_build_query([
    "poc" => "false",
    "limit" => "10",
    "local" => "false",
    "recent" => "false",
    "api_key" => "DEMO_KEY",
    "expired" => "false",
    "keyword" => "test",
    "law_type" => "example",
    "user_type" => "example",
    "technology" => "example",
    "jurisdiction" => "example",
    "incentive_type" => "example",
    "regulation_type" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Return the law categories for a given category type.

Return the law categories for a given category type.

https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}?type=tech&api_key=DEMO_KEY

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}?type=tech&api_key=DEMO_KEY"

import requests
params = {
    "type": "tech",
    "api_key": "DEMO_KEY"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}');
url.searchParams.set('type', 'tech');
url.searchParams.set('api_key', 'DEMO_KEY');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}")
	q := baseURL.Query()
	q.Set("type", "tech")
	q.Set("api_key", "DEMO_KEY")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}")
uri.query = URI.encode_www_form({
  "type" => "tech",
  "api_key" => "DEMO_KEY"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/category-list.{output_format}?" . http_build_query([
    "type" => "tech",
    "api_key" => "DEMO_KEY"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Get the points of contact for a given jurisdiction.

Get the points of contact for a given jurisdiction.

https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}?api_key=DEMO_KEY&jurisdiction=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}?api_key=DEMO_KEY&jurisdiction=example"

import requests
params = {
    "api_key": "DEMO_KEY",
    "jurisdiction": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}');
url.searchParams.set('api_key', 'DEMO_KEY');
url.searchParams.set('jurisdiction', 'example');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}")
	q := baseURL.Query()
	q.Set("api_key", "DEMO_KEY")
	q.Set("jurisdiction", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}")
uri.query = URI.encode_www_form({
  "api_key" => "DEMO_KEY",
  "jurisdiction" => "example"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/nrel.gov/transportation-incentives-laws/0.1.0/v1/pocs.{output_format}?" . http_build_query([
    "api_key" => "DEMO_KEY",
    "jurisdiction" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

See official documentation for authentication and setup.

What can you build with Transportation Laws and Incentives?

Transportation Laws and Incentives is a Data API. Developers commonly use data APIs for:

enriching your app with third-party datasets
building data pipelines and ETL workflows
querying and searching large datasets
powering research, analysis, and reporting tools
syncing reference data into your own systems

No authentication required. This API is open — no signup or key needed. Ideal for quick prototypes and public-facing features. Transportation Laws and Incentives is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide · Learn about API keys · What is REST?

Open documentation ↗