---
id: marshmallow-jsonapi
version: "0.24.0"
license: MIT
license_treatment: permissive
maintenance: abandoned
---

# marshmallow-jsonapi — JSON API 1.0 (https://jsonapi.org) formatting with marshmallow

License: permissive · Maintenance: abandoned · Downloads: 99.8K/mo

## What it is and what it does

marshmallow-jsonapi extends marshmallow to serialize Python objects into JSON API 1.0-compliant responses. It handles the structural requirements of the JSON API spec—wrapping data in a top-level 'data' key, separating attributes from relationships, and generating proper resource linkage—so you don't have to manually construct the envelope. You define a schema with field types and relationship declarations, then call dump() to get a spec-compliant response ready to send from your web API.

The package is built on top of marshmallow and adds JSON API-specific field types (like Relationship) and a Meta configuration layer to declare resource types and relationship URLs. It works with any Python web framework and is designed for straightforward serialization workflows where you want JSON API compliance without building the response structure by hand.

Use it for:

- Serialize REST API responses to JSON API 1.0 format in Flask, Django, or FastAPI applications.
- Define relationships between resources (author, comments) and automatically generate proper linkage in the response.
- Validate and deserialize incoming JSON API requests back into Python objects using marshmallow's validation layer.
- Build a consistent API response structure across multiple endpoints without manually constructing the envelope.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Produces JSON API 1.0-compliant output from Python objects using marshmallow schemas, with built-in support for relationships, resource linkage, and typed resources.

No. The package is archived and abandoned since 2023-06-28, with no releases for over 5 years. While it has low install friction and permissive licensing, the lack of maintenance means it will not receive bug fixes, security updates, or compatibility patches for current Python and marshmallow versions. Use only if you have an existing codebase already depending on it and cannot migrate; for new projects, choose an actively maintained JSON API library.

## Install

pip install marshmallow-jsonapi
uv add marshmallow-jsonapi
poetry add marshmallow-jsonapi

## Installing marshmallow-jsonapi

Before you install: Low install friction; depends only on marshmallow. However, the package is archived and unmaintained since 2023-06-28, with no releases in over 5 years. Use only if you are committed to maintaining compatibility yourself or have no active development planned.

License in practice: MIT licensed (permissive). You can use, modify, and distribute freely with minimal restrictions, though you must include the license notice.

Quickstart:

pip install marshmallow-jsonapi

from marshmallow_jsonapi import Schema, fields

class PostSchema(Schema):
    id = fields.Str(dump_only=True)
    title = fields.Str()
    class Meta:
        type_ = "posts"

schema = PostSchema()
result = schema.dump(post_object)

Requires Python >= 3.6; the package is archived and receives no updates.

Verify before relying:

- Whether the package remains compatible with current versions of marshmallow and modern Python 3.x releases.
- Whether JSON API 1.0 spec compliance is maintained across edge cases or has drifted since the last release.

## Package facts

- License: MIT (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: abandoned
- Downloads: 99.8K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

json api serialization, marshmallow json api, jsonapi 1.0 formatting, rest api response formatting, relationship serialization, json-api, serialization, archived

[View on SkillFed](https://skillfed.io/packages/marshmallow-jsonapi) · [View on PyPI](https://pypi.org/project/marshmallow-jsonapi/)