What is Vocab Voyage?

Vocab Voyage is an AI-powered vocabulary learning platform for ISEE, SSAT, SAT, PSAT, GRE, GMAT, LSAT, and general academic vocabulary. Sparkle, the AI tutor, builds personalized sessions from flashcards, adaptive quizzes, word games, reading passages, and spaced repetition.

Which standardized tests does Vocab Voyage cover?

ISEE (Lower, Middle, Upper), SSAT (Elementary, Middle, Upper), SAT, PSAT 8/9 and PSAT 10, ACT, GRE, GMAT, and LSAT, plus a year-round General Academic Vocabulary course.

Is Vocab Voyage free to start?

Yes. Vocab Voyage is completely free: every course and word set, AI-guided sessions, quizzes, mini-games, the Sparkle AI tutor and progress tracking. No credit card required.

Can parents and tutors track student progress?

Yes. Parent and tutor dashboards show streaks, XP, mastery breakdowns, recent mistakes, assignments, and weekly digest reports for every linked student.

Does Vocab Voyage have an API or MCP server for AI agents?

Yes. Vocab Voyage publishes llms.txt, llms-full.txt, an OpenAPI spec, a zero-auth public REST API, an MCP server with interactive widgets, and an A2A agent card so agents like ChatGPT and Claude can use it directly.

What does “potable” mean?

potable (adjective) means safe to drink; drinkable.

How do you use “potable” in a sentence?

The campers were relieved to find a source of potable water.

What are synonyms of “potable”?

Words with a similar meaning to potable include drinkable. Opposites include undrinkable.

Is “potable” a test vocabulary word?

Yes — potable appears in ISEE Upper Level, SSAT Upper Level, PSAT 8/9 Vocabulary Prep, General Vocabulary on Vocab Voyage, and you can practise it free with a 3-question quiz on this page.

Vocab Voyage Agent Resources

This is the structured agent-mode view for https://vocab.voyage/?mode=agent. It is rendered before any JavaScript runs so AI crawlers and orank-style scanners can extract endpoints, scopes, and discovery URLs without executing scripts.

Vocab Voyage exposes vocabulary learning resources for AI agents through a zero-auth REST API, OpenAPI, llms.txt, MCP discovery, MCP Apps UI resources, NLWeb /ask, 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

NLWeb /ask

POST natural-language questions to https://gponcrussdahcdyrlhcr.supabase.co/functions/v1/nlweb-ask. Responses follow the NLWeb shape with _meta. Send prefer.streaming: true in the body or Accept: text/event-stream for SSE streaming with start, result, and complete events.

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

Vocab Voyage is completely free. Every course, word set, mini-game, AI tutor feature, parent dashboard and tutor dashboard is included at no cost. There are no paid tiers and no credit card is required. Details: 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.

Supported standardized tests

ISEE Lower, Middle, and Upper Level. SSAT Elementary, Middle, and Upper Level. SAT, PSAT 8/9, and PSAT 10. GRE, GMAT, and LSAT. Plus year-round General Academic Vocabulary.

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.