Materials Project · Capability
Materials Project API — Defect Tasks
Materials Project API — Defect Tasks. 1 operations. Lead operation: Get DefectTaskDoc documents. Self-contained Naftiko capability covering one Materials Project business surface.
What You Can Do
GET
Searchdefectstasksget
— Get DefectTaskDoc documents
/v1/defects/tasks
MCP Tools
get-defecttaskdoc-documents
Get DefectTaskDoc documents
read-only
idempotent
Capability Spec
naftiko: 1.0.0-alpha2
info:
label: Materials Project API — Defect Tasks
description: 'Materials Project API — Defect Tasks. 1 operations. Lead operation: Get DefectTaskDoc documents. Self-contained
Naftiko capability covering one Materials Project business surface.'
tags:
- Materials Project
- Defect Tasks
created: '2026-05-19'
modified: '2026-05-19'
binds:
- namespace: env
keys:
MATERIALS_PROJECT_API_KEY: MATERIALS_PROJECT_API_KEY
capability:
consumes:
- type: http
namespace: materials-project-defect-tasks
baseUri: ''
description: Materials Project API — Defect Tasks business capability. Self-contained, no shared references.
resources:
- name: defects-tasks
path: /defects/tasks/
operations:
- name: searchdefectstasksget
method: GET
description: Get DefectTaskDoc documents
outputRawFormat: json
outputParameters:
- name: result
type: object
value: $.
inputParameters:
- name: formula
in: query
type: string
description: Query by formula including anonymized formula or by including wild cards. A comma delimited string
list of anonymous formulas or regular formulas can also be pr
- name: chemsys
in: query
type: string
description: A comma delimited string list of chemical systems. Wildcards for unknown elements only supported for
single chemsys queries
- name: elements
in: query
type: string
description: Query by elements in the material composition as a comma-separated list
- name: exclude_elements
in: query
type: string
description: Query by excluded elements in the material composition as a comma-separated list
- name: task_ids
in: query
type: string
description: Comma-separated list of task_ids to query on
- name: last_updated_min
in: query
type: string
description: Minimum last updated UTC datetime
- name: last_updated_max
in: query
type: string
description: Maximum last updated UTC datetime
- name: _page
in: query
type: integer
description: Page number to request (takes precedent over _limit and _skip).
- name: _per_page
in: query
type: integer
description: Number of entries to show per page (takes precedent over _limit and _skip). Limited to 1000.
- name: _skip
in: query
type: integer
description: Number of entries to skip in the search.
- name: _limit
in: query
type: integer
description: Max number of entries to return in a single query. Limited to 1000.
- name: _fields
in: query
type: string
description: 'Fields to project from DefectTaskDoc as a list of comma separated strings. Fields
include: `nsites` `elements` `nelements` `composition` `com'
- name: _all_fields
in: query
type: boolean
description: Include all fields.
authentication:
type: apikey
key: X-API-KEY
value: '{{env.MATERIALS_PROJECT_API_KEY}}'
placement: header
exposes:
- type: rest
namespace: materials-project-defect-tasks-rest
port: 8080
description: REST adapter for Materials Project API — Defect Tasks. One Spectral-compliant resource per consumed operation,
prefixed with /v1.
resources:
- path: /v1/defects/tasks
name: defects-tasks
description: REST surface for defects-tasks.
operations:
- method: GET
name: searchdefectstasksget
description: Get DefectTaskDoc documents
call: materials-project-defect-tasks.searchdefectstasksget
with:
formula: rest.formula
chemsys: rest.chemsys
elements: rest.elements
exclude_elements: rest.exclude_elements
task_ids: rest.task_ids
last_updated_min: rest.last_updated_min
last_updated_max: rest.last_updated_max
_page: rest._page
_per_page: rest._per_page
_skip: rest._skip
_limit: rest._limit
_fields: rest._fields
_all_fields: rest._all_fields
outputParameters:
- type: object
mapping: $.
- type: mcp
namespace: materials-project-defect-tasks-mcp
port: 9090
transport: http
description: MCP adapter for Materials Project API — Defect Tasks. One tool per consumed operation, routed inline through
this capability's consumes block.
tools:
- name: get-defecttaskdoc-documents
description: Get DefectTaskDoc documents
hints:
readOnly: true
destructive: false
idempotent: true
call: materials-project-defect-tasks.searchdefectstasksget
with:
formula: tools.formula
chemsys: tools.chemsys
elements: tools.elements
exclude_elements: tools.exclude_elements
task_ids: tools.task_ids
last_updated_min: tools.last_updated_min
last_updated_max: tools.last_updated_max
_page: tools._page
_per_page: tools._per_page
_skip: tools._skip
_limit: tools._limit
_fields: tools._fields
_all_fields: tools._all_fields
outputParameters:
- type: object
mapping: $.