Clinical Trials

Search and analyze clinical trials from ClinicalTrials.gov

Available Tools (12)

• search_trials_by_condition: Search clinical trials by medical condition(s).

This tool allows you to search for clinical trials based on a list of medical conditions.

Input:

• conditions: A list of strings, where each string is a medical condition to search for. The search will find trials related to any of the specified conditions. Example: ['cancer', 'diabetes']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call
• search_trials_by_intervention: Search clinical trials by intervention/treatment.

This tool allows you to search for clinical trials based on a list of interventions or treatments.

Input:

• interventions: A list of strings, where each string is an intervention or treatment to search for. The search will find trials related to any of the specified interventions. Example: ['aspirin', 'chemotherapy']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call
• search_trials_by_sponsor: Search clinical trials by sponsor/organization.

This tool allows you to search for clinical trials based on a list of sponsor organizations.

Input:

• sponsors: A list of strings, where each string is a sponsor organization to search for. The search will find trials sponsored by any of the specified organizations. Example: ['National Cancer Institute', 'Pfizer']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call
• search_trials_by_acronym: Search clinical trials by study acronym.

Uses the Acronym field (protocolSection.identificationModule.acronym) to find trials by their public short name. Example: 'TETON'. The API search is seeded with the provided acronyms to narrow results, then results are filtered locally to ensure the acronym field matches the requested value(s).

Input:

• acronyms: One or more acronyms to search for (e.g., ['TETON']).
• max_studies: Maximum number of studies to request from the API.
• exact_match: When true (default), matches acronyms exactly (case-insensitive). When false, matches if any provided acronym is contained within the study acronym (case-insensitive partial match).
• fields: A list of specific fields to return in the results. If not provided, returns ACRONYM_SEARCH_DEFAULTS (8 fields optimized for acronym discovery: NCTId, BriefTitle, Acronym, Condition, InterventionName, Phase, LeadSponsorName, HasResults). — $0.01/call
• search_trials_by_nct_ids: Retrieve specific clinical trials by NCT ID(s).

This tool allows you to retrieve the details of specific clinical trials by providing their NCT IDs.

Input:

• nct_ids: A list of strings, where each string is an NCT ID to retrieve. Example: ['NCT04280705', 'NCT04280718']
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call
• search_trials_combined: Search clinical trials using multiple criteria.

This tool allows you to perform a combined search using multiple criteria such as conditions, interventions, sponsors, and general terms.

Input:

• conditions: A list of medical conditions to search for.
• interventions: A list of interventions or treatments to search for.
• sponsors: A list of sponsor organizations to search for.
• terms: A list of general search terms.
• nct_ids: A list of specific NCT IDs to include in the search.
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call
• get_trial_details: Get comprehensive details for a single clinical trial.

This tool retrieves detailed information for a single clinical trial given its NCT ID.

Input:

• nct_id: The NCT ID of the trial to retrieve. Example: 'NCT04280705'
• fields: A list of specific fields to return. If not provided, returns DETAIL_TOOL_DEFAULTS (25 comprehensive fields covering: NCTId, BriefTitle, OfficialTitle, Acronym, Condition, Keyword, Phase, OverallStatus, InterventionType, InterventionName, InterventionDescription, ArmGroupLabel, ArmGroupType, ArmGroupDescription, EligibilityCriteria, MinimumAge, MaximumAge, Sex, PrimaryOutcomeMeasure, SecondaryOutcomeMeasure, BriefSummary, LocationFacility, LocationCountry, LeadSponsorName, CollaboratorName, HasResults). — $0.01/call
• get_trial_details_batched: Retrieve detailed clinical trial records in batches to reduce payload during discovery.

Accepts a list of NCT IDs and fetches details in batches (default 10). Preserves the order of input NCT IDs in the returned list. Use this after search tools which return a minimal field set.

Input:

• nct_ids: List of NCT IDs to retrieve in batches.
• fields: Specific fields to return. If not provided, returns DETAIL_TOOL_DEFAULTS (25 comprehensive fields covering: NCTId, BriefTitle, OfficialTitle, Acronym, Condition, Keyword, Phase, OverallStatus, InterventionType, InterventionName, InterventionDescription, ArmGroupLabel, ArmGroupType, ArmGroupDescription, EligibilityCriteria, MinimumAge, MaximumAge, Sex, PrimaryOutcomeMeasure, SecondaryOutcomeMeasure, BriefSummary, LocationFacility, LocationCountry, LeadSponsorName, CollaboratorName, HasResults).
• batch_size: Number of trials to fetch per API call (default 10). — $0.01/call
• analyze_trial_phases: Analyze the distribution of trial phases for given search criteria.

This tool analyzes the distribution of clinical trial phases (e.g., Phase 1, Phase 2, Phase 3) for a given set of search criteria.

Input:

• conditions: A list of medical conditions to filter the analysis.
• interventions: A list of interventions to filter the analysis.
• sponsors: A list of sponsors to filter the analysis.
• max_studies: The maximum number of studies to include in the analysis. Defaults to 1000. — $0.01/call
• get_field_statistics: Get statistical information about field values.

This tool retrieves statistical information about the values of specified fields in the ClinicalTrials.gov database.

Input:

• field_names: A list of field names to get statistics for.
• field_types: A list of field types to filter by. Example: ['ENUM', 'STRING'] — $0.01/call
• get_available_fields: Get organized list of available fields for customizing search results.

This tool provides a list of available fields that can be used to customize the results of other search tools. The fields are organized into categories.

Input:

• category: An optional string to specify a category of fields to return. If not provided, all categories and default fields will be returned. Example: 'conditions' — $0.01/call
• search_trials_nct_ids_only: Lightweight search returning only NCT IDs and minimal metadata for discovery.

This tool performs a lightweight search that returns only the NCT IDs and minimal metadata for the purpose of discovering relevant trials.

Input:

• conditions: A list of medical conditions to search for.
• interventions: A list of interventions or treatments to search for.
• sponsors: A list of sponsor organizations to search for.
• terms: A list of general search terms.
• max_studies: The maximum number of studies to return. Defaults to 100. — $0.01/call

Quick Start

{
  "mcpServers": {
    "clinical-trials": {
      "url": "https://clinical-trials.mcp.xpay.sh/mcp?key=YOUR_XPAY_KEY"
    }
  }
}

Pricing

$0.01 per tool call. Pay per use from your XPay wallet. No subscriptions.

Get an API key at xpay.tools.

Tools: 12 Category: Academic & Research

When to Use

Use Clinical Trials tools when you need to search and analyze clinical trials from clinicaltrials.gov. All tools are available through xpay✦'s single MCP connection.

MCP Connection

{
  "mcpServers": {
    "xpay": {
      "url": "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"
    }
  }
}

For Claude Code:

claude mcp add --transport http xpay "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"

Available Tools

• Search Trials By Condition — Search clinical trials by medical condition(s).

This tool allows you to search for clinical trials based on a list of medical conditions.

Input:

• conditions: A list of strings, where each string is a medical condition to search for. The search will find trials related to any of the specified conditions. Example: ['cancer', 'diabetes']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call — SKILL.md
• Search Trials By Intervention — Search clinical trials by intervention/treatment.

This tool allows you to search for clinical trials based on a list of interventions or treatments.

Input:

• interventions: A list of strings, where each string is an intervention or treatment to search for. The search will find trials related to any of the specified interventions. Example: ['aspirin', 'chemotherapy']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call — SKILL.md
• Search Trials By Sponsor — Search clinical trials by sponsor/organization.

This tool allows you to search for clinical trials based on a list of sponsor organizations.

Input:

• sponsors: A list of strings, where each string is a sponsor organization to search for. The search will find trials sponsored by any of the specified organizations. Example: ['National Cancer Institute', 'Pfizer']
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call — SKILL.md
• Search Trials By Acronym — Search clinical trials by study acronym.

Uses the Acronym field (protocolSection.identificationModule.acronym) to find trials by their public short name. Example: 'TETON'. The API search is seeded with the provided acronyms to narrow results, then results are filtered locally to ensure the acronym field matches the requested value(s).

Input:

• acronyms: One or more acronyms to search for (e.g., ['TETON']).
• max_studies: Maximum number of studies to request from the API.
• exact_match: When true (default), matches acronyms exactly (case-insensitive). When false, matches if any provided acronym is contained within the study acronym (case-insensitive partial match).
• fields: A list of specific fields to return in the results. If not provided, returns ACRONYM_SEARCH_DEFAULTS (8 fields optimized for acronym discovery: NCTId, BriefTitle, Acronym, Condition, InterventionName, Phase, LeadSponsorName, HasResults). — $0.01/call — SKILL.md
• Search Trials By Nct Ids — Retrieve specific clinical trials by NCT ID(s).

This tool allows you to retrieve the details of specific clinical trials by providing their NCT IDs.

Input:

• nct_ids: A list of strings, where each string is an NCT ID to retrieve. Example: ['NCT04280705', 'NCT04280718']
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call — SKILL.md
• Search Trials Combined — Search clinical trials using multiple criteria.

This tool allows you to perform a combined search using multiple criteria such as conditions, interventions, sponsors, and general terms.

Input:

• conditions: A list of medical conditions to search for.
• interventions: A list of interventions or treatments to search for.
• sponsors: A list of sponsor organizations to search for.
• terms: A list of general search terms.
• nct_ids: A list of specific NCT IDs to include in the search.
• max_studies: The maximum number of studies to return. Defaults to 50.
• fields: A list of specific fields to return in the results. If not provided, returns SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition, Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults). — $0.01/call — SKILL.md
• Get Trial Details — Get comprehensive details for a single clinical trial.

This tool retrieves detailed information for a single clinical trial given its NCT ID.

Input:

• nct_id: The NCT ID of the trial to retrieve. Example: 'NCT04280705'
• fields: A list of specific fields to return. If not provided, returns DETAIL_TOOL_DEFAULTS (25 comprehensive fields covering: NCTId, BriefTitle, OfficialTitle, Acronym, Condition, Keyword, Phase, OverallStatus, InterventionType, InterventionName, InterventionDescription, ArmGroupLabel, ArmGroupType, ArmGroupDescription, EligibilityCriteria, MinimumAge, MaximumAge, Sex, PrimaryOutcomeMeasure, SecondaryOutcomeMeasure, BriefSummary, LocationFacility, LocationCountry, LeadSponsorName, CollaboratorName, HasResults). — $0.01/call — SKILL.md
• Get Trial Details Batched — Retrieve detailed clinical trial records in batches to reduce payload during discovery.

Accepts a list of NCT IDs and fetches details in batches (default 10). Preserves the order of input NCT IDs in the returned list. Use this after search tools which return a minimal field set.

Input:

• nct_ids: List of NCT IDs to retrieve in batches.
• fields: Specific fields to return. If not provided, returns DETAIL_TOOL_DEFAULTS (25 comprehensive fields covering: NCTId, BriefTitle, OfficialTitle, Acronym, Condition, Keyword, Phase, OverallStatus, InterventionType, InterventionName, InterventionDescription, ArmGroupLabel, ArmGroupType, ArmGroupDescription, EligibilityCriteria, MinimumAge, MaximumAge, Sex, PrimaryOutcomeMeasure, SecondaryOutcomeMeasure, BriefSummary, LocationFacility, LocationCountry, LeadSponsorName, CollaboratorName, HasResults).
• batch_size: Number of trials to fetch per API call (default 10). — $0.01/call — SKILL.md
• Analyze Trial Phases — Analyze the distribution of trial phases for given search criteria.

This tool analyzes the distribution of clinical trial phases (e.g., Phase 1, Phase 2, Phase 3) for a given set of search criteria.

Input:

• conditions: A list of medical conditions to filter the analysis.
• interventions: A list of interventions to filter the analysis.
• sponsors: A list of sponsors to filter the analysis.
• max_studies: The maximum number of studies to include in the analysis. Defaults to 1000. — $0.01/call — SKILL.md
• Get Field Statistics — Get statistical information about field values.

This tool retrieves statistical information about the values of specified fields in the ClinicalTrials.gov database.

Input:

• field_names: A list of field names to get statistics for.
• field_types: A list of field types to filter by. Example: ['ENUM', 'STRING'] — $0.01/call — SKILL.md
• Get Available Fields — Get organized list of available fields for customizing search results.

This tool provides a list of available fields that can be used to customize the results of other search tools. The fields are organized into categories.

Input:

• category: An optional string to specify a category of fields to return. If not provided, all categories and default fields will be returned. Example: 'conditions' — $0.01/call — SKILL.md
• Search Trials Nct Ids Only — Lightweight search returning only NCT IDs and minimal metadata for discovery.

This tool performs a lightweight search that returns only the NCT IDs and minimal metadata for the purpose of discovering relevant trials.

Input:

• conditions: A list of medical conditions to search for.
• interventions: A list of interventions or treatments to search for.
• sponsors: A list of sponsor organizations to search for.
• terms: A list of general search terms.
• max_studies: The maximum number of studies to return. Defaults to 100. — $0.01/call — SKILL.md

How to Execute

1. xpay_discover — Search for tools: xpay_discover("clinical-trials")
2. xpay_details — Get input schema: xpay_details("clinical-trials/TOOL_NAME")
3. xpay_run — Execute: xpay_run("clinical-trials/TOOL_NAME", { ...inputs })
4. xpay_balance — Check credits

Links

• Provider page: https://xpay.tools/clinical-trials/
• All providers: https://xpay.tools/explore
• Docs: https://docs.xpay.sh