WebSequenceDiagrams
WebSequenceDiagrams scores 70/100 on xpay's Agent-Ready Index v2: partial pricing visibility; self-serve checkout is available; a public API exists with documentation; a free entry path exists.
WebSequenceDiagrams pricing
Basic
Free
foreverPro
$10/mo
or $10/mo billed annuallyTeam
$699/user/yr
~$58/mo equivEnterprise Server
$5999
one-timeHow WebSequenceDiagrams scores on the agent-ready dimensions
Public pricing visibility
15 / 15
Self-serve checkout
15 / 15
Public API + docs
16 / 20
Usage-based / metered pricing
0 / 20
Free entry path
7 / 7
No sales call required
7 / 7
Card / wallet / x402 payment
5 / 6
Machine-readable bonus (MCP / OpenAPI)
5 / 10
Total
70 / 100
What it actually costs at typical scale
1 user, Pro plan (monthly billing)
$10/mo
10 users, Team plan (annual billing)
$58.25/mo
Can an autonomous agent transact here?
Can create account
Can enter payment method
Can upgrade plan
Can buy more usage
Can cancel online
Payment methods
Human approval recommended
Pricing transparency
partial
Purchase motion
self_serve
Demo required
Quote required
Annual commit required
Auto-renewal mentioned
Cancellation policy visible
Refund policy visible
Minimum commit
$699
Minimum term
12 months
Invoice payment available
Purchase orders supported
MSA required
Unknown
DPA available
Unknown
Security review required
Unknown
API & developer surface
API-first product
Public API docs
Sandbox present
Webhooks
MCP mentioned
Positioning & ecosystem
“The only sequence diagram engine built for massive architectures.”
Buyer persona
Six-step check: can an agent actually buy from WebSequenceDiagrams?
Discover price
Select a plan
Pay per task
Avoid a sales call
API docs without auth
Estimate cost upfront
Pros and cons for AI agents
Observational summary written by xpay from the signals captured on 2026-05-06. Not a review of the product — only of its current pricing posture for agent buyers.- Pricing is publicly visible on an indexable page — agents can read tiers without scraping past auth.
- Every advertised tier is self-serve; no tier requires scheduling a call.
- No per-unit price was advertised, so an agent has no way to estimate the cost of a single task.
- API documentation is gated or absent; an agent cannot inspect the integration surface without authentication.
- No /.well-known/ai-pricing.json or equivalent machine-readable pricing manifest is published — agents must rely on HTML scraping.
- The pricing URL did not render numeric tier data on the scoring date — possibly a router or sales-led landing page.
How WebSequenceDiagrams could lift its score
Add a per-unit price (e.g. $X / 1K calls) to the pricing page so an agent can compute its own cost before committing.
| pricing_visible | false |
| headline_phrasing | WebSequenceDiagrams - Draw sequence diagrams online in seconds |
| tier_count | 0 |
| lowest_paid_entry_usd | null |
| free_tier | false |
| free_tier_terms | null |
| per_unit_price | null |
| annual_required | false |
| self_serve_paid_tiers | 0 |
| sales_only_tiers | 0 |
| public_api_docs_url | null |
| api_docs_auth_walled | null |
| ai_pricing_json_present | false |
| agents_txt_present | false |
| anonymous_purchase_path | false |
| per_unit_classification | null |
| usage_headline_present | false |
| custom_tier_present | false |
| agent_friendly | {"ai_pricing_json":false,"agents_txt":false,"llms_txt":false,"sitemap_xml":false,"mcp_server_card":false,"agent_skills_index":false,"x402_supported":false} |
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See agent-ready picksWebSequenceDiagrams
70
/ 100 (rubric v2.0)Diagram
WebSequenceDiagrams - Draw sequence diagrams online in seconds
0
No
Sales-led
0 / 0
Auth-walled
No
Not published
2026-05-10
Tier-based subscription
WebSequenceDiagrams pricing starts at $0/mo for the Basic plan; paid plans up to $10/mo for the Pro plan; billed monthly or annually.
Free plan (Free)
Discovery files and protocols
Side-channel signals — informational, not part of the score. Each protocol is independent; adoption signals the publisher is thinking about agent buyers.ai-pricing.json
agents.txt
llms.txt
sitemap.xml
MCP Server Card
Agent Skills
x402 / MPP
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Explore the Agent-Ready SaaS Index
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