Developer Tools & APIs

Developer Tools & APIs on AI Demos focuses on structured, agent-ready building blocks that turn messy inputs into usable data. Tools like Firecrawl for web scraping and data extraction, LlamaParse and Airparser for resume parsing and schema extraction, and AskYourDatabase for natural-language SQL queries show how teams can move from raw documents and web pages to clean outputs fast. If you’re shipping AI workflows, support bots, or data pipelines, this category helps you compare APIs by real behavior—not hype—so you can plug the right tool into production with confidence.

29 resources across tools, rankings, comparisons & guides

Tested by us35 tool tests·6 tested rankingsLast test: June 2026
Best forCross-session agent memory with selective recall
HHindsightUpdated July 2026

Strongest balance of selective retrieval, visible memory usage, scope isolation, and cross-session continuity.

See the test →
Best forZero-selector web scraping into Markdown
SSkyvernTested June 2026

Highest structural quality across the three live tests, especially on noisy and JS-heavy pages, with slower runs and some recording-sync fragility.

See the test →
Best forBank statement and invoice data extraction
LLanding AITested June 2026

Strong schema adherence and complete row/line-item extraction, but it invents sequential transaction IDs and occasionally misreads alphanumeric codes.

See the test →
Best forMulti-document RAG knowledge-base chatbots
VVoiceflowTested June 2026

Voiceflow was the strongest overall performer, combining the best multi-document reasoning in the test with excellent follow-up context, proactive answers, and the most responsible crisis handling.

See the test →
Best forProduction PDF to Markdown conversion
EExtend AIUpdated June 2026

Most consistent across all document types; production-ready default choice.

See the test →
Best forResume parsing into HR-ready JSON
AAffindaTested April 2026

Affinda is a professional-grade resume-parsing API with 100+ configurable fields, skill-taxonomy metadata via EMSI IDs, language-proficiency extraction, and both a web UI and a REST API. It is built for HR-tech platforms, ATS vendors, and recruitment-automation pipelines that need structured JSON at scale.

See the test →

What we learned testing this category

Stateful agent memory is judged by selective retrieval and clean forgetting, not by how much context it can store. The memory-tool test favored Hindsight because it balanced selective retrieval, visible memory usage, scope isolation, and cross-session continuity. The same test also checked delete/forget requests, which shows that a good memory tool must avoid leaking stale context as well as remember useful details.

For web scraping, structural quality on hard pages mattered more than raw speed. Skyvern won because it produced the highest-quality output across noisy and JavaScript-heavy pages, including a cluttered recipe blog, a JS-heavy product page, and a protected jobs page. The verdict also notes slower runs and recording-sync fragility, so the best scraper was not the fastest one.

In document extraction, schema adherence and complete row-level extraction were more important than perfect field correctness. Landing AI won by staying close to the target schema and capturing rows and line items completely across a bank statement and an invoice. The same verdict says it still invented sequential transaction IDs and occasionally misread alphanumeric codes, so even the winner was optimized more for structured completeness than flawless entity accuracy.

Knowledge-base chatbots are differentiated by multi-document reasoning and follow-up context, not just single-turn retrieval. Voiceflow was strongest because it combined the best multi-document reasoning with excellent follow-up context across a seven-document knowledge base. The test also singled out proactive answers and responsible crisis handling, showing that grounded support behavior mattered alongside retrieval quality.

For PDF-to-markdown APIs, consistency across document types is the main production requirement. Extend AI won because it was the most consistent across a hybrid annual report, a table-heavy financial report, and an image-only scanned paper. The test framing makes clear that usable markdown needs OCR, tables, charts, and reading order preserved well enough for downstream RAG, search, and reuse.

Hireability
Tool

Hireability

Strong resume-to-JSON parsing on standard and messy single-column PDFs, but two-column layouts can break the result schema.

Docparser
Tool

Docparser

Template-based resume parsing that works on one fixed layout, but breaks on varied resumes.

Replit
Tool

Replit

Replit can turn a plain-text workflow prompt into a polished animated diagram app, but it does so through a coding agent rather than a templated diagram generator.

Ranking

Best Open-Source Libraries for PDF to Markdown Conversion

We tested five open-source PDF-to-Markdown libraries on the same three mixed PDFs — a hybrid annual report, a table-heavy financial filing, and a scanned research paper — to compare text preservation, table reconstruction, chart handling, image retention, reading order, and OCR behavior.

markitdown
Tool

markitdown

Fast native-PDF text extraction for markdown, but structure, charts, images, and scans are unreliable.

pymupdf4llm
Tool

pymupdf4llm

Open-source PDF-to-markdown for clean native PDFs, but unreliable on scans, dense tables, and images.

docling
Tool

docling

Open-source PDF-to-markdown conversion that is strong on text, headings, and standard tables, but drops charts and other visual assets.

liteparse
Tool

liteparse

Open-source PDF-to-markdown parsing that works well on native-digital reports, but degrades on scans, tables, and charts.

doc2mark
Tool

doc2mark

Open-source PDF-to-markdown that preserves native text and headings, but still struggles with tables, charts, images, and scans.

Cognee
Tool

Cognee

Inspectable graph-backed memory for AI agents, with strong provenance tracing but cautious update/delete behavior.

Supermemory
Tool

Supermemory

Hosted agent memory with strong capture and scoping, but mixed retrieval and weak forget behavior.

Hindsight
Tool

Hindsight

Selective, inspectable memory for real agent workflows, with strong retrieval and scope control.

Mem0
Tool

Mem0

Mem0 remembers useful agent context across sessions and makes retrieved memory visible, but stale context can linger after updates or forget requests.

Zep
Tool

Zep

Developer-first memory for AI agents that captures workflow context well, but still needs stronger stale-memory and forget control.

Ranking

Best AI Agent Memory Tools (2026): Tested & Ranked

We tested five memory tools with the same multi-session prompts to see which ones can remember user style, client history, project direction, and delete/forget requests without leaking stale context.

Parseur
Tool

Parseur

Template-driven resume parsing that returns predictable JSON after one-time setup.

Skima AI
Tool

Skima AI

Fast PDF resume parsing with dependable core fields and experience-year calculation, but weak structured output and supplemental coverage.

Tool

Airparser

Parses clean, multi-column, and messy resumes into structured JSON, but email, title, and skill formatting still need validation.

CVParserPro
Tool

CVParserPro

Parses resume PDFs into structured candidate profiles quickly, but experience totals and education dates need manual review.

Llamaparse
Tool

Llamaparse

Reliable PDF-to-Markdown conversion for hybrid reports, with strong hierarchy and table capture but weaker preservation of complex table semantics and embedded visuals.

Gemini
Tool

Gemini

Fast browser prompt-to-code animation and single-reference character variation, but polish and face lock lag.

Ranking

Best AI Tools for Structured Document Extraction from Bank Statements and Invoices

We tested seven AI document extraction tools on a dense bank statement PDF and a structured broadcast invoice PDF, checking schema adherence, row-level completeness, transaction IDs, line items, totals, confidence metadata, and export-ready JSON.

Media
Guide

Query Live Databases Using Plain English with AI

This use case shows how business users can query a live database using plain English instead of writing SQL. We tested five AI database tools on the same ecommerce database and found AskYourDatabase to be the best practical workflow because it showed generated SQL, returned readable business answers, handled follow-ups well, and surfaced operational risks like pending-but-paid orders. The page also covers real outputs, limitations, and when users should still review the SQL before acting on results.

Ranking

Best AI Tools to Scrape Web Pages Into Clean Markdown or Structured Data

We tested four AI web-scraping tools on three live targets—a cluttered recipe blog, a JS-heavy Nike product page, and a protected Glassdoor jobs page—to see which ones return usable Markdown or structured data with zero manual selectors.

Best Developer Tools & APIs AI Tools & Guides