Font pairings

Fonts that pair with Source Serif 4

Curated heading and body companions for Source Serif 4 — free, open-licensed typefaces that complement its serif character, each shown with the reasoning behind the match. Preview every one in its own face, then hand the pairing to your agent.

mcpConnect your agent — pair Source Serif 4 live

live endpoint

Point any MCP client at the shared fonts endpoint and your agent can search this exact catalog and suggest pairings — list_fonts and suggest_fonts, read-only, no key.

endpointhttps://mcp.brandsweets.com/fonts/mcp

claude mcp add --transport http brandsweets-fonts https://mcp.brandsweets.com/fonts/mcp

try this prompt

›suggest a heading and body pairing based on Source Serif 4

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Heading fonts for Source Serif 4

Source Sans 3

sanssource200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Paul D. Hunt · OFL-1.1

View specimen →

Same superfamily — natural pairing for articles and docs.

Roboto

sansroboto100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Christian Robertson, ParaType, Font Bureau · Apache-2.0

View specimen →

fits heading; hand-vetted

Inter

sans100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Rasmus Andersson · OFL-1.1

View specimen →

fits heading; hand-vetted

Montserrat

sans100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Julieta Ulanovsky, Sol Matas, Juan Pablo del Peral, Jacques Le Bailly · OFL-1.1

View specimen →

fits heading; hand-vetted

Poppins

sans100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Indian Type Foundry, Jonny Pinhorn, Ninad Kale · OFL-1.1

View specimen →

fits heading; hand-vetted

Lato

sans100 · 300 · 400 · 700 · 900

Łukasz Dziedzic · OFL-1.1

View specimen →

fits heading; hand-vetted

Body fonts for Source Serif 4

Source Sans 3

sanssource200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Paul D. Hunt · OFL-1.1

View specimen →

Same superfamily as Source Serif 4 — shared skeleton, natural body pairing.

Open Sans

sans300 · 400 · 500 · 600 · 700 · 800

Steve Matteson · OFL-1.1

View specimen →

fits body; hand-vetted

Roboto

sansroboto100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Christian Robertson, ParaType, Font Bureau · Apache-2.0

View specimen →

fits body; hand-vetted

Inter

sans100 · 200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Rasmus Andersson · OFL-1.1

View specimen →

fits body; hand-vetted

Lato

sans100 · 300 · 400 · 700 · 900

Łukasz Dziedzic · OFL-1.1

View specimen →

fits body; hand-vetted

Nunito

sans200 · 300 · 400 · 500 · 600 · 700 · 800 · 900

Vernon Adams, Cyreal, Jacques Le Bailly · OFL-1.1

View specimen →

fits body; hand-vetted