UnsignedInt — GraphQL Custom Scalar
Author – ChilliCream
Date – 2026-01-09
License and Copyright
Copyright © GraphQL contributors. This specification is licensed under OWFa 1.0.
1Overview
The UnsignedInt scalar type represents an unsigned 32-bit integer. It is intended for scenarios where values are constrained to the range 0 to 4,294,967,295, such as representing counts, sizes, indices, or other non-negative integer values.
Unlike the built-in Int scalar which represents signed 32-bit integers with a range of -2,147,483,648 to 2,147,483,647, UnsignedInt provides stronger type safety for values that must be non-negative and can represent larger positive values.
2Recommended name
The recommended name for this scalar is UnsignedInt.
3Result spec
An UnsignedInt scalar must serialize to an integer value in the range 0 to 4,294,967,295 (inclusive).
3.1Examples
These are valid result values:
| Value | Explanation |
|---|---|
0 |
Minimum unsigned int value. |
4294967295 |
Maximum unsigned int value. |
2147483648 |
A value exceeding signed int maximum. |
These are invalid result values:
| Value | Why is it invalid |
|---|---|
-1 |
Negative values are not allowed. |
4294967296 |
Exceeds maximum unsigned int value. |
3.14 |
Fractional values are not allowed. |
"1000" |
Must be a number, not a string. |
4Input spec
An UnsignedInt scalar accepts integer values in the range 0 to 4,294,967,295 (inclusive), both as GraphQL literals and as JSON input values.
Implementations should validate:
- Value is an integer (no fractional component)
- Value is between 0 and 4,294,967,295 (inclusive)
- Value is not negative
4.1Examples
Valid input values:
GraphQL Literal:
query {
items(limit: 100, offset: 50) {
id
}
}
JSON input:
{
"limit": 100,
"offset": 50
}
{
"count": 4294967295
}
Invalid input values:
| Value | Why is it invalid |
|---|---|
-1 |
Negative values are not allowed. |
4294967296 |
Exceeds maximum unsigned int value. |
3.14 |
Fractional values are not allowed. |
"1000" |
Must be a number, not a string. |
5References
- GraphQL Specification – Int — Built-in integer scalar type