Updated October 26, 2026 with EIA August 2026 prices
API and MCP server
Free, no key required. Use the JSON endpoints for data, /api/cost for calculations, or connect an AI assistant to the MCP server at https://evchargecosts.com/mcp.
Calculation endpoint
GET https://evchargecosts.com/api/cost?state=TX&vehicle=48771&miles=13500Parameters: state (two-letter code, required), vehicle (EPA id from /api/vehicles.json) or kwh (kWh per 100 miles), miles (per year), optional price (ยข/kWh), public (% public charging), publicprice ($/kWh), mpg and gasprice for an EV vs gas comparison, addmiles and kw for charging time.
MCP server
Endpoint: https://evchargecosts.com/mcp (Streamable HTTP, JSON responses). Tools: calculate_ev_charging_cost, compare_ev_vs_gas_cost, estimate_ev_charging_time, get_state_electricity_price, search_vehicles.
{
"mcpServers": {
"ev-charge-cost": { "type": "http", "url": "https://evchargecosts.com/mcp" }
}
}Static data endpoints
/api/states.jsonAll states with price, rank and costs
/api/states/{state-slug}.jsonOne state, for example
/api/states/texas.json/api/vehicles.jsonEvery EV trim with EPA efficiency and range
/api/rankings.jsonLatest monthly ranking
/openapi.jsonOpenAPI 3.1 description
In-browser agents (WebMCP)
Every calculator form is annotated with WebMCP attributes, so browser agents can call it as a tool and receive a structured result.
Terms
Free to use with attribution under CC BY 4.0. Please cache responses; data changes at most weekly.