What is Vocab Voyage?

Vocab Voyage is an AI-powered vocabulary learning app for standardized test prep and academic vocabulary growth.

Does Vocab Voyage have an API for agents?

Yes. Vocab Voyage publishes a zero-auth REST API, OpenAPI spec, llms.txt resources, and a Streamable HTTP MCP server.

Vocab Voyage Agent Resources

Q: What tests does Vocab Voyage support?

Vocab Voyage supports ISEE, SSAT, SAT, PSAT, GRE, GMAT, LSAT, and general academic vocabulary.

Vocab Voyage exposes vocabulary learning resources for AI agents through a zero-auth REST API, OpenAPI, llms.txt, MCP discovery, MCP Apps UI resources, and structured pricing documentation.

Public REST API

Base URL: https://gponcrussdahcdyrlhcr.supabase.co/functions/v1/vocab-api

Health	GET /health
Definition	GET /definition?word=aberrant
Word of the day	GET /word-of-the-day?test_family=sat
Courses	GET /courses
Course words	GET /course-word-list?course_slug=sat-vocab&limit=20
Quiz	GET /quiz?test_family=sat&count=5
Study plan	GET /study-plan-preview?test_family=sat

MCP discovery

MCP endpoint: https://gponcrussdahcdyrlhcr.supabase.co/functions/v1/mcp-server
Primary discovery: https://vocab.voyage/.well-known/mcp.json
Server card: https://vocab.voyage/.well-known/mcp/server-card.json
MCP Apps resources: https://vocab.voyage/.well-known/mcp/apps.json

Auth scopes and limits

REST endpoints require no authentication. Optional MCP personal tokens begin with vv_mcp_ and can include mcp.read, mcp.tools, profile.read, and progress.read. Anonymous REST traffic is 60 requests/minute per IP; authenticated MCP traffic is 600 requests/hour per user.

Structured errors

Errors use JSON fields error_code, message, hint, and retry_after. Agents should honor Retry-After, X-RateLimit-Limit, and X-RateLimit-Remaining.

Pricing summary

Starter is free. Paid plans and family access are documented at https://vocab.voyage/pricing.md.

Machine-readable links

Vocab Voyage — AI Vocabulary Learning for ISEE, SSAT, SAT, GRE, GMAT and LSAT

Vocab Voyage helps students master standardized test vocabulary with Sparkle, an adaptive AI tutor. Sparkle starts with a short placement quiz, then builds personalized sessions that mix flashcards, adaptive quizzes, word games, reading passages, writing challenges, spaced repetition, and progress tracking. The platform supports ISEE, SSAT, SAT, PSAT, GRE, GMAT, LSAT, and general academic vocabulary.

What students can practice

Test-specific word lists for ISEE, SSAT, SAT, PSAT, GRE, GMAT, LSAT, and General Vocabulary.
Definitions, parts of speech, example sentences, synonyms, antonyms, and mnemonics.
Eleven mini-games, including word scrambles, spelling practice, speed rounds, and challenges.
Parent and tutor dashboards for assignments, progress reports, mastery tracking, and weekly digests.

Developer and agent resources

AI agents and developers can use Vocab Voyage through public documentation and machine-readable endpoints: developer docs, API reference, OpenAPI spec, pricing markdown, full agent documentation, MCP server card, and MCP setup guide. Public API examples include word of the day, definition lookup, course lists, quiz generation, course word lists, and study plan previews.