Unverified50% confidenceDecision RuleExact time
Vercel explicitly requires that each project use only one configuration file: vercel.toml, vercel.json or vercel.ts.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
11/3/2026
First Seen
Valid until: 2/1/2027
Sources
Related Entities
Related Claims
Unverifiedvercel.toml is a configuration file used in Vercel projects to declare deployment behavior; like vercel.json it is a project-level configuration, but it uses TOML syntax, which is better suited to expressing nested structures and arrays of tables.80% similarUnverifiedVercel Services is configured by placing a vercel.toml file in the repository root, in which the [services.*] section defines sub-applications and the [[rewrites]] section defines routing rules.73% similarUnverifiedVercel's schema is published with vercel.json as the baseline, so the vercel.toml file reuses the same JSON Schema address.72% similarUnverifiedIf a project relies on type checking or dynamic logic in a TypeScript configuration, vercel.ts remains a more suitable choice than vercel.toml, as TOML cannot replace code-level capabilities.67% similarUnverifiedvercel.toml supports exactly the same configuration properties as vercel.json, so the migration cost is low.64% similar
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