Head to head · Design templates · October 2026 research run

Pixelixe vs Robolly

Robolly scores 48.4 (D) on agent readiness against Pixelixe's 37.3 (F), and leads in 5 of 7 scored categories. Pixelixe leads on schema & documentation and maintenance & community. Both do design templates.

Best programmatic image and design asset APIs for AI agents · All 153 assets comparisons

Which one, for what

Pixelixe F

Best for Template fills and white-label editing for marketing and SaaS teams, with a JSON-to-graphic route for agents.

Ahead on

  • Schema & documentation, 66 against 57
  • Maintenance & community, 19 against 5

Watch for

Every error is HTTP 400 with a free-text message, including wrong keys and exhausted credits

Robolly D

Best for Template-driven images, PDFs and short videos for marketers and developers who want a hosted editor and simple synchronous calls.

Ahead on

  • Reliability, 48 against 15
  • Agent ergonomics, 75 against 49
  • Security & auth, 47 against 38
  • Payments & pricing, 35 against 30
  • Transparency & trust, 49 against 41

Watch for

No OpenAPI or other machine-readable contract found

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Reliability Robolly +33

Pixelixe 15

Hosted lines. No status page found on the site or in the docs (0). No readable incident history (5). No rate limit is published; the terms only forbid circumventing them (0). No 429, Retry-After or backoff guidance. Every error, a wrong key and exhausted credits included, is a 400 with a message (0). No SLA found; the terms supply the service as is (0). API v2 is current and not labelled beta (10). 0 + 5 + 0 + 0 + 0 + 10 = 15.

Robolly 48

Hosted lines. The footer links an UptimeRobot status page, but it loads its figures from /api/, which stats.uptimerobot.com's robots.txt disallows, so the page showed no monitors or history (10 of 20 for a page that exists) and no history was read (5). A hard limit of 3 renders a second is published (15). The rate-limit error code and advice to send renders one at a time, and identical renders are cached for 45 days at no cost, which makes a retry safe; there's no Retry-After or backoff interval (8 of 15). No SLA found (0). The API isn't labelled beta (10). 10 + 5 + 15 + 8 + 0 + 10 = 48.

Agent ergonomics Robolly +26

Pixelixe 49

Seven compact MCP tools (25). Document and design-set search filters, with no pagination documented (10 of 20). All errors are 400 with free-text messages, so an agent can't branch on a code (6 of 20). No idempotency keys, and annotations couldn't be read on the closed server. The MCP tools only read and create, with nothing that deletes (5 of 20). Few required fields, but no official SDK (3 of 15). 25 + 10 + 6 + 5 + 3 = 49.

Robolly 75

Nine MCP tools (25). The renders list pages with a cursor, and templates are found by name (14 of 20). Errors carry errorCode and developerMessage with eight documented codes (17 of 20). Identical renders are cached for 45 days, so repeats are free and safe, the MCP server has no delete tool, and annotations couldn't be read on the closed server (12 of 20). Renders return the file synchronously by default, but there's no SDK (7 of 15). 25 + 14 + 17 + 12 + 7 = 75.

Maintenance & community Pixelixe +14

Pixelixe 19

No dated release or API change was found. The newest dated items are the MCP registry entry of 26 March 2026 and the privacy policy of 7 April 2026, more than 180 days before this check (0). No three dated changes since 8 August (0). No changelog. Support by email at inquiries@pixelixe.com, not tested (4 of 15). com.pixelixe/pixelixe-mcp is in the official MCP registry under a domain-verified namespace; there are no official SDKs (15). No public package or repository (0). 0 + 0 + 4 + 15 + 0 = 19.

Robolly 5

No changelog, release notes or dated API change was found. The sitemap marks every docs page as modified on 4 November 2026, which reads as a site rebuild rather than a change, so it isn't counted (0). No dated changes since 8 August (0). Support by email, with chat on higher plans; not tested (5 of 15). Not in the official MCP registry and no SDKs (0). No public package or repository (0). 0 + 0 + 5 + 0 + 0 = 5.

Schema & documentation Pixelixe +9

Pixelixe 66

OpenAPI 3.1 (version 2.0.0) at pixelixe.com/pixelixe-openapi.json, but it covers four endpoints, authentication, document search, graphic automation and photo effects, and leaves out the JSON-to-graphic and image processing APIs (18 of 25). llms.txt exists but routes readers to marketing pages; the MCP reference is written for LLMs (7 of 10). The MCP reference says what each of the seven tools maps to, that pixelixe_generate_graphic_variant 'is not a free-form layout API', lists common mistakes and how to present outputs (17 of 20). The MCP layer documents canonical field names and refuses legacy aliases; the REST modifications are open structures keyed by element name (10 of 15). Request examples throughout, but errors are one table of message strings all returning 400 (8 of 15). /v2 paths and a deprecated V1, with no changelog (6 of 15). 18 + 7 + 17 + 10 + 8 + 6 = 66.

Robolly 57

No OpenAPI or other machine-readable contract found for the REST API, and the MCP server is closed. The MCP page lists all nine tools and get_template_modifications returns each template's keys, constraints and examples at run time (8 of 25, on that partial evidence). llms.txt indexes the docs (10). The MCP page says what each tool does, which tools change templates or spend credits, and that there is no delete tool (14 of 20). Modification keys follow {element-name}.{modification-key} with constraints from the template rather than a fixed schema (7 of 15). Request examples throughout and an error code table with eight codes (13 of 15). /v1 paths with no changelog (5 of 15). 8 + 10 + 14 + 7 + 13 + 5 = 57.

Security & auth Robolly +9

Pixelixe 38

A bearer API key per account, plus a public key for the embedded editor. The MCP server accepts the key or an OAuth token from studio.pixelixe.com/oauth/mcp with one pixelixe.mcp scope. No key scopes, rotation or revocation documented (18 of 30). No read-only mode, though the MCP tools can't delete or change account settings (10 of 20). Tools return the account's own templates and renders (10 of 15). No audit log or per-call record documented (0). No security.txt, disclosure policy, bug bounty or certification found (0). 18 + 10 + 10 + 0 + 0 = 38.

Robolly 47

Bearer API key, signed render links, and MCP OAuth with one robolly:mcp scope limited to the organisation the user approves. Connections are listed and revoked under Connected AI Tools, and the API key is never shared with an OAuth client. No key scopes or rotation documented (22 of 30). The MCP server can create and update templates but not delete them; there's no read-only mode (10 of 20). Tools return the user's templates and public gallery designs (10 of 15). A renders list and the connected-tools view give some visibility, with no audit log documented (5 of 15). No security.txt (the path returns the site's HTML shell), disclosure policy, bug bounty or certification (0). 22 + 10 + 10 + 5 + 0 = 47.

Transparency & trust Robolly +8

Pixelixe 41

Closed service under terms of 19 March 2026 that choose French law but name no company (12 of 30). The privacy policy of 7 April 2026 keeps account data while the account is active and 'as long as reasonably necessary' after, with no periods, and says nothing about AI processing or training (10 of 30). V1 is marked deprecated in the docs with no dates or notice period (5 of 20). Processors are described only by category, with Google Analytics named, and data processed in France, the EEA and other vendor countries (5 of 20). 12 + 10 + 5 + 5 = 32.

Robolly 49

Closed service under terms effective 8 April 2026 from Avantis Innovations LLC in Wyoming. The terms can change without notice (15). The privacy policy of the same date covers Google sign-in and Sheets data, says spreadsheet rows aren't kept beyond a render and account data is deleted with the account, and otherwise names no periods (10 of 30). No deprecation policy or notices (0). Hosting is described only as third-party vendors, with no processors or locations named, while the footer says Made in EU (2 of 20). 15 + 10 + 0 + 2 = 27.

Score by category

CategoryWeight this runPixelixeRobollyEdge
Reliability16%201548Robolly +33
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26657Pixelixe +9
Agent ergonomics13%16.24975Robolly +26
Security & auth14%17.53847Robolly +9
Payments & pricing10%12.53035Robolly +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8195Pixelixe +14
Transparency & trust7%8.84149Robolly +8
Negative events≤1500
TotalF 37.3/100D 48.4/100

Facts side by side

FactPixelixeRobolly
KindHTTP APIHTTP API
VendorPixelixeAvantis Innovations LLC (Robolly)
Hosted endpointhttps://studio.pixelixe.com/apihttps://api.robolly.com/v1
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
LicenceClosed service under the Pixelixe terms of service (last modified 19 March 2026)Closed service under the Robolly terms of use (effective 8 April 2026)
Tools exposed79
Read-only variant documentednono
llms.txtyesyes
MCP registrycom.pixelixe/pixelixe-mcpnot listed
Last release2026-03-26none
Terms last updated2026-03-192026-04-08
Privacy policy last updated2026-04-072026-04-08
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textyes

Verdicts

Pixelixe

Pixelixe's seven MCP tools and their LLM-oriented reference make template fills and JSON-to-graphic creation simple to call, with an OpenAPI file for the core endpoints. Every error comes back as a 400 with a message, there are no published rate limits, status page or changelog, and API access starts at $59 a month.

Robolly

Robolly's nine MCP tools, synchronous renders, typed error codes and free cached re-renders keep template rendering cheap and predictable for an agent, and OAuth connections can be revoked per client. There is no OpenAPI file, changelog or dated release, and API access starts at $39 a month after a 7-day trial.

Before you call either

Pixelixe

  1. Call pixelixe_search_documents first to find the document_uid of the template to reuse
  2. Use pixelixe_generate_graphic_variant to fill an existing template; it can't change the layout
  3. Read the error message text, since every failure is a 400
  4. Stop and tell the user on 'Not enough Credits'; retrying won't help
  5. For a batch, use pixelixe_create_multiple_images and summarise counts rather than inlining every image

Robolly

  1. Call get_template_modifications before render to learn the keys a template accepts
  2. Send renders one at a time; the API refuses more than 3 a second with rate-limit
  3. Repeat an identical render freely; it is cached for 45 days and costs nothing
  4. Poll get_render after render_video, since video renders are queued
  5. Stop on render-limit-exhausted and tell the user the monthly credits are spent

Questions

Which is better for AI agents, Pixelixe or Robolly?

Robolly scores 48.4 (D) on agent readiness against Pixelixe's 37.3 (F), and leads in 5 of 7 scored categories. Pixelixe leads on schema & documentation and maintenance & community.

Do Pixelixe and Robolly need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Pixelixe and Robolly without installing anything?

Yes. Pixelixe has a hosted endpoint at https://studio.pixelixe.com/api and Robolly at https://api.robolly.com/v1.

Other comparisons with Pixelixe or Robolly

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