Public API Principles
On this page
- OAuth 2.0 authentication for programmatic access to Cloud Manager is available as a Preview feature.
- The feature and the corresponding documentation might change at any time during the Preview period. To use OAuth 2.0 authentication, create a service account to use in your requests to the Cloud Manager Public API.
The Cloud Manager Public API follows the REST architecture principles to expose internal resources that provide programmatic access to Cloud Manager's features.
As with changes made through the web interface, changes made through the API are subject to Cloud Manager pricing. If you add servers and incur charges, you must have a valid credit card on file with Cloud Manager or risk having your account locked.
The API has the following features:
- JSON entities
- All entities are expressed in JSON.
- Browsable interface
- Using a consistent linking mechanism, you can browse the entire API by starting at the root resource and following links to related resources.
- User Access Control
Each Cloud Manager user's API capabilities match the permissions that their Cloud Manager Roles grant.
Example
A user with the
Project Read Only
role cannot modify any resource within that project whether through the Cloud Manager UI or the API.- API Network Access List
The Cloud Manager API can secure access to the Cloud Manager Administration API through an API Access List. This list restricts access to the API to specific IP or CIDR addresses. Each API key has its own Cloud Manager Administration API access list. When you create a new organization using the Cloud Manager UI, the MongoDB Atlas enables the API access list requirement by default.
To learn more, see (Optional) Require an API Access List for Your Organization.
- HTTPS Only
- You can access the API only via HTTPS, which ensures all data sent over the network is fully encrypted using TLS.
HTTP Methods
All resources support a subset of these common HTTP Methods:
Method | Purpose |
---|---|
GET | Retrieve the JSON representation of a resource. |
POST | Create a new resource using the provided JSON representation. |
PUT | Replace a resource with the provided JSON representation. |
PATCH | Update the specified fields in a resource using the provided
JSON representation. |
DELETE | Remove a resource. |
HEAD | Retrieve the response header without the JSON representation
of the resource. |
JSON
All entities are represented in JSON. The following rules for requests and conventions of responses apply:
Request Rules
- Apply the Correct Content Type Header
- When sending JSON to the server via
POST
orPUT
, make sure to specify the correct content type request header:Content-Type: application/json
- Set Dates as ISO 8601 Strings
When sending dates to the server (as query parameters or fields in
POST
orPATCH
request entities), use dates formatted according to the ISO 8601 standard. If you don't specify a time zone, Cloud Manager assumes UTC. Include a time zone designator to avoid any ambiguity.Example
September 27, 2018 is expressed as
2018-09-27
.September 27, 2018 at 4:00 PM EDT is expressed (with time zone) as
2018-09-27T16:00-04:00
.
In some cases, a timestamp is returned as a JSON representation of a BSON timestamp, most notably in the backup resources. This representation of a BSON timestamp provides a JSON document as an object with two fields:
FieldDefinitiondate
Seconds since the UNIX Epochincrement
An incrementing 32-bit integer ordinal for operations within a given second.Example
The third operation at September 27, 2018 at 4:00 PM EDT is expressed (with time zone) as
{ date: 2018-09-27T16:00-04:00, increment: 3 }
Response Conventions
- Rejects Invalid Fields
Invalid fields are rejected rather than ignored.
Example
You attempt to create a new entity and misspell one of the fields, or if you attempt to update an existing entity and include a field that cannot be modified, the Cloud Manager responds with an HTTP 400 status code and an error message stating which field was invalid.
- Returns Dates as ISO 8601 Strings
- All dates are returned as ISO 8601-formatted strings designated in UTC.
- Labels Field to Disambiguate Units
Fields that contain numeric values in a particular unit are named so as to disambiguate the unit being used.
Example
A host's uptime is returned in millseconds, so the name of the host entity field is
uptimeMsec
.- Returns Default Values for Fields without Other Values
Fields that do not have a current value are returned with an appropriate default value.
Example
Cloud Manager does not have any statistics for a newly discovered host, so any statistics-related fields have a value of zero.
Fields that do not have a sensible default value are omitted from the entity.
Example
A host that is not using authentication omits the
username
field from the returned entity.- Returns Fields in Alphabetical Order
- The fields in the JSON documents that the Cloud Manager returns are in alphabetical order. The order could change. Do not depend on the order of the fields.
Linking
Each resource includes one or more links to sub-resources and/or related resources.
Example
A host has a link to the project it belongs to, the replica set it belongs to, and so on.
Links are placed in the links
field of an entity, which is an
array of link relation objects. Each link relation has two fields:
Field | Definition |
---|---|
rel | Name (or type) of the relation. Many of these are
considered Extension Relation Types and are prefixed by
http://mms.mongodb.com . |
href | Target URL. |
All entities include at least one link relation called self
, which
is simply its own URL. When an entity is part of a list (i.e., when
requesting all hosts in a project), then it only includes the self
link relation.
Example
This is a portion of a host
resource with a few links:
1 { 2 "id": "xxx", 3 "projectId": "yyy", 4 "hostname": "mongodb.example.com", 5 "port": 27017, 6 "links": [ 7 { 8 "rel": "self", 9 "href": "https://cloud.mongodb.com/api/public/v1.0/projects/xxx/hosts/yyy" 10 }, 11 { 12 "rel": "http://mms.mongodb.com/project", 13 "href": "https://cloud.mongodb.com/api/public/v1.0/projects/xxx" 14 } 15 ] 16 }
To learn more, see the Web Linking Specification.
Note
Although the Web Linking Specification describes a format for including links in the HTTP response headers, it is not required. To make the API easily browsable, it includes the links in the response body rather than in the response headers.
Lists
Some resources return a list of entities.
Example
You can request a list of all hosts in a project.
When a list of entities is expected in a response, the results are returned in batches bounded by two query parameters:
Field | Definition |
---|---|
pageNum | Page number (1-based). Defaults to 1 if not specified. |
itemsPerPage | Number of items to return per page, up to a maximum of 500.
Defaults to 100 if not specified. |
The response entity contains three fields:
Field | Definition |
---|---|
totalCount | Total number of items in the entire result set. For example, if a project has a total of 57 hosts, and you make a request
with |
results | Result set, which is an array of entity documents. |
links | Contains one to three link relations:
|
If you make a request for a list of entities and there are no results,
then the API responds with an HTTP 200 status code and an empty
results
array. It does not respond with a 404 in this case,
since the list of entities may not be empty at some point in the
future.
If you had requested a list of entities in a context that does not exist (i.e., the list of hosts for a non-existent project), then this results in a an HTTP 404 response status.
Example
This is an HTTP response for the second page of 10 hosts in a project with a total of 57 hosts:
1 { 2 3 "totalCount": 57, 4 "results": [ 5 { 6 "id": "yyy", 7 "projectId": "xxx", 8 // additional host properties... 9 }, 10 // additional host documents... 11 ], 12 "links": [ 13 { 14 "rel" : "self", 15 "href" : "https://www.mongodb.com/api/public/v1.0/projects/xxx/hosts?pageNum=2&itemsPerPage=10" 16 }, 17 { 18 "rel": "previous", 19 "href": "https://www.mongodb.com/api/public/v1.0/projects/xxx/hosts?itemsPerPage=10&pageNum=1" 20 }, 21 { 22 "rel": "next", 23 "href": "https://www.mongodb.com/api/public/v1.0/projects/xxx/hosts?itemsPerPage=10&pageNum=3" 24 } 25 ] 26 }
Envelopes
Some clients may not be able to access the HTTP response headers
and/or status code. In that case, you can request that the response
include an envelope
, which is simply an extra layer of information
in the JSON document that contains any relevant details that would
normally be in the response headers.
By default, the API does not include the response in an envelope.
To request one, simply add the query parameter envelope=true
.
For responses that contain a single entity, the envelope contains two fields:
Field | Definition |
---|---|
status | HTTP status code. |
content | Requested entity. |
For responses that contain a list of entities, there is already an
envelope that wraps the results, so specifying envelope=true
as a
query parameter in this case only adds the status
field to the
existing envelope.
Pretty Printing
By default, extraneous whitespace is stripped from the JSON that
Cloud Manager returns. To ask for pretty-printed JSON, simply append the
pretty=true
query parameter to any request:
curl --user '{PUBLIC-KEY}:{PRIVATE-KEY}' --digest \ --header 'Accept: application/json' \ --include \ --request GET "https://cloud.mongodb.com/api/public/v1.0?pretty=true"
Note
All the examples in this document show pretty-printed JSON for clarity, although some example URLs may not contain this additional query parameter.
Response Codes
Responses utilize the standard HTTP response codes, including:
Code | Meaning | Notes |
---|---|---|
200 | OK | The request was successful. This is the typical response to a
successful GET request. |
201 | Created | A new resource was created. This is the typical response to a
successful POST request. |
202 | Accepted | A request for an asynchronous operation was accepted. |
400 | Bad Request | Something was wrong with the client request. |
401 | Unauthorized | Authentication is required but was not present in the request.
Typically this means that the digest authentication information
was omitted from the request, the provided credentials are
incorrect, or the user associated with the given API key is
not allowed to access the requested resource. |
403 | Forbidden | Access to the specified resource is not permitted. |
404 | Not Found | The requested resource does not exist. |
405 | Method Not Allowed | The HTTP method is not supported for the specified resource. Keep in mind that each resource may only support a subset of HTTP methods. For example, you are not allowed to |
409 | Conflict | This is typically the response to a request to create or modify a property of an entity that is unique when an existing entity already exists with the same value for that property. For example, if you attempt to create a project with the same name as an existing project, the request fails. |
5xx | Various server errors | Something unexpected went wrong. Try again later and consider
notifying Cloud Manager Support. |
Errors
When a request results in an error, the response body contains a JSON document with additional details about what went wrong. The document contains five fields:
Field | Data Type | Definition |
---|---|---|
detail | string | Human-readable description of the API request error. |
error | integer | HTTP status code. |
errorCode | string | Named constant representing the API request error as shown in
Cloud Manager Administration API Error Codes. |
parameters | array of strings | List of parameters passed in the API request. |
reason | string |
Example
Cloud Manager returns this response body for an incorrectly formatted request:
1 { 2 "detail" : "Cannot find resource /api/public/v1.0/softwareComponents/version.", 3 "error" : 404, 4 "errorCode" : "RESOURCE_NOT_FOUND", 5 "parameters" : [ "/api/public/v1.0/softwareComponents/version" ], 6 "reason" : "Not Found" 7 }
To review the list of codes, see Cloud Manager Administration API Error Codes.
Authentication
The Cloud Manager API uses one of two methods to authenticate requests: API keys or service accounts. This ensures that the keys and access tokens that serve as usernames and passwords are never sent over the network. For usage details, see Programmatic Access to Cloud Manager.
API Keys | Service Account |
---|---|
Legacy method of authenticating to Cloud Manager that uses
HTTP digest authentication. | New method of authenticating to Cloud Manager using the
industry standard OAuth 2.0 protocol with the Client Credentials flow.
Currently in Preview. |
API keys have two parts: a Public Key and a Private Key. These
two parts serve the same function as a username and a password when you
make API requests to Cloud Manager. | A service account lets you manage permissions and create access tokens. A
service account has a client ID and a secret that function as a username
and a password for creating access tokens. An access token lets you
make API requests to Cloud Manager. |
Cloud Manager hashes the Public Key and Private Key using a unique value called
a nonce.
The nonce is only valid for a short amount of time as per the
HTTP digest specification. This is to prevent replay
attacks, so you can't cache a nonce and use it forever. | After you create a service account, you'll use its client ID and secret to
generate an access token, which authenticates your API requests.
Access tokens are only valid for 1 hour (3600 seconds) per the
OAuth 2.0 specification. Expiration of access tokens prevents
replay attacks, where a leaked access token could be used without a time restriction. |
Cloud Manager roles limit which operations API keys can perform.
You must grant roles to
API keys as you would for users to ensure the API keys can call API
endpoints without errors. | Cloud Manager roles limit which operations a service account
can perform with its access token. You must grant roles to service accounts
as you would for users to ensure the access token can call API endpoints
without errors. |
Cloud Manager binds many resources to a project. Many API resource
URLs follow the format of /api/public/v1.0/groups/<PROJECT-ID>/ .
For these resources, the API keys must be a member of the
organization that hosts the project. Otherwise, Cloud Manager
responds with a 401 error. | Cloud Manager binds many resources to a project. Many API resource
URLs follow the format of /api/public/v1.0/groups/<PROJECT-ID>/ .
For these resources, the service account must be a member of the
organization that hosts the project. Otherwise, Cloud Manager
responds with a 401 error. |
Each API key belongs to only one organization, but you can grant
API keys access to any number of projects in that
organization. | Each service account belongs to only one organization, but you can grant
a service account access to any number of projects in that organization. |
Some resource methods require even more security and are additionally protected by access lists that allow access to the resource only from the IP addresses listed. Each user configures their own access list of IP addresses that allow access to the resource.
Automation
The Automation Configuration Resource and Get Automation Status of Latest Plan resources provide endpoints that let you modify a project's deployment and retrieve deployment status. You can modify a deployment by sending a new automation configuration to Cloud Manager. The automation configuration is where you describe and configure the MongoDB processes to be deployed. Cloud Manager refers to this as the deployment's "goal state." When you submit a new automation configuration through the API, the Automations adjust the current state of the system to match the goal state.
Important
There is no protection in the API to prevent concurrent modifications. If two administrators both start with a configuration based on the current version, make their own modifications, and then submit their modifications, the later modification wins.
Rate Limiting
Certain resources are subject to rate limiting.
For resources that are rate limited, Cloud Manager allows up to 100 requests per minute per project. Keep in mind that a Public API Key is assigned to a Cloud Manager user, but that user may access multiple projects.
Example
Consider two users: A and B.
User A belongs to project X, and user B belongs to projects X and Y.
At 1:00:00pm, User A makes 50 requests to a rate limited resource in project X, all of which complete by 1:00:20pm.
At 1:00:30pm, User B attempts to make 60 requests to a rate limited resource in project X.
Since User A has already used up 50 requests within the 1:00pm minute for project X, the last 10 requests User B attempts to make are rejected. However, User B can make requests to a rate limited resource in project Y, since each project maintains a separate request counter.
At 1:01pm, requests to project X may proceed, because the request counter used for rate limiting reset each minute.
If you exceed the rate limit, the API returns an HTTP
429 Too Many Requests
response code.
Additional Information
See Cloud Manager Administration API Resources for a complete reference of all resources available in the Cloud Manager Public API.