# Nylas Policies API

**Canonical:** https://apis.io/apis/nylas/nylas-policies-api/  
**Provider:** Nylas — https://apis.io/providers/nylas/  
**Base URL:** https://api.us.nylas.com  
**Documentation:** https://developer.nylas.com/docs/reference/api/applications/

Nylas Policies API is one of 40 APIs that [Nylas](https://apis.io/providers/nylas/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Policies. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, API documentation, a getting-started guide, authentication docs, and rate-limit docs.

The Policies endpoints let you define the operational configuration for Nylas Agent Accounts, including message limits, attachment constraints, spam detection settings, and linked rules for inbound message filtering. Each policy is scoped to your application and can be assigned to one or more Agent Accounts, or attached to a [workspace](/docs/reference/api/workspaces/) to apply its limits and spam settings to the Agent Accounts it contains. Policies let you control: - **Limits** — Attachment sizes, counts, allowed types, total storage, daily message quotas, and retention periods for the inbox and spam folders. - **Spam detection** — DNS-based block list (DNSBL) checking, header anomaly detection, and sensitivity tuning. - **Rules** — Link filtering rules (created via the Rules API) to automatically process inbound messages based on sender criteria. Policy limits are validated against your plan's maximum values. If a limit field is omitted, it defaults to the plan maximum. If a requested value exceeds the plan limit, the API returns an error.

## Operations (5)

| Method | Path | Summary |
|---|---|---|
| POST | `/v3/policies` | Create a policy |
| GET | `/v3/policies` | List policies |
| GET | `/v3/policies/{policy_id}` | Get a policy |
| PUT | `/v3/policies/{policy_id}` | Update a policy |
| DELETE | `/v3/policies/{policy_id}` | Delete a policy |

## Machine-readable artifacts (17)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/nylas/refs/heads/main/openapi/nylas-policies-api-openapi.yml
- **APIReference** — https://developer.nylas.com/docs/reference/notifications/
- **Documentation** — https://developer.nylas.com/docs/v3/notifications/
- **Documentation** — https://developer.nylas.com/docs/
- **APIReference** — https://developer.nylas.com/docs/reference/api/
- **GettingStarted** — https://developer.nylas.com/docs/v3/getting-started/
- **Authentication** — https://developer.nylas.com/docs/v3/auth/
- **RateLimits** — https://developer.nylas.com/docs/dev-guide/platform/rate-limits/
- **ErrorCodes** — https://developer.nylas.com/docs/api/errors/
- **Pricing** — https://www.nylas.com/pricing/
- **Signup** — https://dashboard-v3.nylas.com/register
- **StatusPage** — https://status.nylas.com/
- **SDKs** — https://github.com/nylas/nylas-nodejs
- **SDKs** — https://github.com/nylas/nylas-python
- **SDKs** — https://github.com/nylas/nylas-ruby
- **SDKs** — https://github.com/nylas/nylas-java
- **APIReference** — https://developer.nylas.com/docs/reference/api/application-level-templates/

## Other Nylas APIs (12)

- [Nylas Contacts API](https://apis.io/apis/nylas/nylas-contacts-api/)
- [Nylas Drafts API](https://apis.io/apis/nylas/nylas-drafts-api/)
- [Nylas Events API](https://apis.io/apis/nylas/nylas-events-api/)
- [Nylas Messages API](https://apis.io/apis/nylas/nylas-messages-api/)
- [Nylas Threads API](https://apis.io/apis/nylas/nylas-threads-api/)
- [Nylas Notetaker API](https://apis.io/apis/nylas/nylas-notetaker-api/)
- [Nylas Amazon SNS Notifications API](https://apis.io/apis/nylas/nylas-amazon-sns-notifications-api/)
- [Nylas App migration API](https://apis.io/apis/nylas/nylas-app-migration-api/)
- [Nylas Application-level templates API](https://apis.io/apis/nylas/nylas-application-level-templates-api/)
- [Nylas Application-level workflows API](https://apis.io/apis/nylas/nylas-application-level-workflows-api/)
- [Nylas Applications API](https://apis.io/apis/nylas/nylas-applications-api/)
- [Nylas Attachments API](https://apis.io/apis/nylas/nylas-attachments-api/)

## Tags

Policies

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/nylas/nylas-policies-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/nylas/.